Undefined

4.7

822 Reviews

CAN$31 to CAN$50

Bistro

Make a reservation

2 people

Mar 11, 2025

7:00 PM

Booked 6 times today

Experiences are available.

Good for special occasions
Great for creative cocktails
Innovative

UnDefined has been changing the way people think about dining out in Hamilton. Voted one of Hamilton's best all-around restaurants for 2021, 2022, 2023, we are making a big impact on King William Street. With an evolving, seasonal and whimsical approach, our passion is what drives us every day. We strive to push the limits, and for our team, it is just what we love to do. We cook from scratch because that is just the way it should be. We love to challenge the way we all think about dining out.

We believe that there is no reason to put yourself in a box when going out with friends, so we do not do that here. Whether it is a night out with friends, an intimate dinner for two, or just something extraordinary, We are not afraid to take the familiar and turn it into something memorable. If it tastes good, we will put it on a plate, in a glass, or whatever. Our mantra is as simple as eat, drink, and enjoy!

Dining areas

Additional information

Location
35 King William St, Hamilton, ON L8R 1A1
Phone number
(905) 393-8343
Price
CAN$31 to CAN$50
Cuisines
Bistro, Farm-to-table, Cocktail Bar
Hours of operation
Brunch Sat, Sun 10:00 am–3:00 pm Lunch Wed–Fri 11:30 am–4:00 pm Dinner Daily 4:00 pm–10:00 pm Bar Fri, Sat 10:00 pm–12:00 am
Dress code
Business Casual
Parking details
Street Parking
Payment options
AMEX, Mastercard, Visa

Gift card

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Experiences

Brunch UnDefined!
Jan 31, 2025 - Apr 30, 2025
Join us for an UnDefined brunch Saturdays & Sundays. UnDefined is know for its ever evolving menus and unique additions. Indulge in some of our favorites as well as a seasonal a la carte offerings to brunch without definition. Reservations highly recommended - No additional costs - Menu offering is a la carte

Popular dishes

WHIPPED GOAT CHEESE
Whipped Goat’s Milk Ricotta | Candied Dates | Arbequina Olive Oil Cracked Pepper | Grilled Sourdough
CRUSTED CALAMARI
Anson Mills Cornmeal | Sichuan Chili Oil | Fennel Pollen | Pickled Anaheim Charred Lemon | Smoked Pepper Mayo
WILD BOAR DUMPLINGS
Manitoban Wild Boar Confit | Pan Seared | Crispy Hand-Folded Dumplings Black Garlic | Citrus Ponzu | “XO” Sauce
MASALA FRITES
Triple-Cooked Burbank Frites | Masala | Curried Aioli | Sumac Raita
SWEET POTATO RACLETTE
Roasted Yams | Oka Raclette | Crème Fraîche | Black Pepper Honey

SALADS

ADD » Grilled Chicken - [8] » Hanger Steak - [12] » Gulf Shrimp - [14]

NIAGARA APPLE “WALDORF SALAD”
Local Apples | Candied Pecans | Shaved Celery | Hydro Greens | Dried Cranberry Walnut Vinaigrette
AVOCADO & CANDIED BACON CHOP
Baby Greens | Grape Tomato | Avocado | Crisp Bacon | Green Goddess Dressing | Boiled Egg
BARTLETT PEAR & KALE SALAD
Crushed Kale | Shaved Carrot | Niagara Pear | Fermented Chili Vinaigrette Olive Oil Breadcrumb | Grana Padano

PLATES

ICELANDIC COD & CHIPS
Merit Stout Tempura | Triple-Cooked Chips | Smashed English Peas Malt Remoulade | Curry Mayo | Lemon
HEIRLOOM CARROT RISOTTO
Toasted Arborio Rice | Brown Butter Carrots | Chlorophyll | Carrot Butter Reggiano Broth | Frico
HANGER STEAK & TRUFFLE FRITES
7 Oz Hanger Prime Steak | Truffle Frites | Gremolata | Veal Reduction

SANDWICHES

CHOICE OF SIDE: » Triple-Cooke Frites » Green Salad

CRISPY PORK BELLY “CUBANO”
24-Hour Crispy Mojo Pork Belly | Smoked Carver Ham | House Pickles Mustard Aioli | Emmental Cheese | Pressed Cuban Bread
FRENCH ONION GRILLED CHEESE
Raclette & Gruyere Cheese | Balsamic Onion Jam | Grilled Brandied Onions | Dear Grain Sourdough
THE UD BURGER
Dry Aged Chuck & Brisket | Served Medium | Red Onion Jam | Québec Oka House Dills | Secret Sauce | Brioche
CHICKEN, AVOCADO & BACON SANDWICH
Grain Fed Chicken Breast | Avocado | Candied Bacon | Baby Arugula Black Garlic Mayo | D.G. Bun | » Choice of Crispy or Grilled

What 822 people are saying

Overall ratings and reviews

Reviews can only be made by diners who have eaten at this restaurant

4.7

4.7 based on recent ratings

4.8Food
4.8Service
4.6Ambience
4.4Value

Noise • Moderate

Loved For

Toronto / Ontario
Bistro
Southern Ontario
Innovative

Review summary

AI-generated from verified diner reviews

Undefined offers an exceptional dining experience with "excellent food," "amazing service," and a vibrant atmosphere. Guests rave about the creative menu with standout dishes like the wild boar dumplings and brunch favorites. The attentive staff, notably Ryan and Kate, ensure a delightful visit. Highly recommended for special occasions or casual outings!

822 Reviews

C
Carolyn VIP
Toronto24 reviews
5.0
Dined 2 days ago
1. Overall 5
2. Food 5
3. Service 5
4. Ambience 5
Always so good! The biscuits are amazing and really so is everything we have tried. Even though we live in Toronto, we love making the trip to Undefined
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J
Jenn
Toronto1 review
5.0
Dined 7 days ago
1. Overall 5
2. Food 5
3. Service 5
4. Ambience 4
Great service, knowledgable server and bartender. Food was great. Really enjoyed the plum mule mocktail!
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G
Greg
Toronto3 reviews
5.0
Dined on March 3, 2025
1. Overall 5
2. Food 5
3. Service 5
4. Ambience 5
What an amazing dinner experience! Hannah was so patient with us and so accommodating (we asked to be moved to a warmer spot), we really appreciated that. And talk about incredible flavours and aromas - wow, we were blown away. Enjoyed the burger, cappelletti and the wild boar dumplings. Each dish was a standout on its own, we thoroughly enjoyed the intriguing falvours and the super-interesting interplay of ingredients and aromas. Just incredible. Oh, the smoked Old Fashioned - what a treat! Fair warning, Hannah: we'll be back! 😂 See you "tomorrow"! Our sincerest thanks for the wonderful experience to the staff - GREAT work!
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AK
AlishaK
Toronto4 reviews
5.0
Dined on March 1, 2025
1. Overall 5
2. Food 5
3. Service 5
4. Ambience 5
Visiting Hamilton for first time from Toronto and SO glad a random stranger from Reddit suggested we do brunch here! The mushroom eggs Benedict is the best eggs benny I’ve ever had. Service was outstanding as well. Eager to go back!
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H
Hannah
Toronto1 review
5.0
Dined on March 1, 2025
1. Overall 5
2. Food 5
3. Service 5
4. Ambience 5
Our server was awesome and food was great! We loved the dumplings and pad thai fries!
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OT
OpenTable Diner
Toronto1 review
3.0
Dined on February 23, 2025
1. Overall 3
2. Food 2
3. Service 4
4. Ambience 4
Disappointed based on previous experiences. Overcooked entries without even an acknowledgment was unexpected for a $200+ receipt.
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S
Steven VIP
Toronto9 reviews
5.0
Dined on February 22, 2025
1. Overall 5
2. Food 5
3. Service 5
4. Ambience 5
Great experience. Great service, waitress was super attentive. The apps are great sized portions and easily shareable. Highly recommend the duck. Will definitely go back.
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D
Destiny
Toronto1 review
5.0
Dined on February 22, 2025
1. Overall 5
2. Food 5
3. Service 5
4. Ambience 5
Erika was great. Food was delicious. We had such a great experience
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K
Kristy
Orlando19 reviews
5.0
Dined on February 20, 2025
1. Overall 5
2. Food 5
3. Service 5
4. Ambience 5
Fabulous! Start to finish! Wish I could’ve tried it all
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RM
RichardM
Toronto4 reviews
5.0
Dined on February 20, 2025
1. Overall 5
2. Food 5
3. Service 5
4. Ambience 5
We live going to Undefined food is consistently outstanding with great drinks
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FAQs

Undefined is rated 4.7 stars by 822 OpenTable diners.

Undefined does offer gift cards which you can purchase here.

Yes, you can generally book this restaurant by choosing the date, time and party size on OpenTable.