tomato

countable, uncountable (pl. to·matoes)
a soft fruit with a lot of juice and shiny red skin that is eaten as a vegetable either raw or cooked
• a bacon, lettuce and tomato sandwich
• sliced tomatoes
• tomato plants
Word Origin:
early 17th cent.: from French, Spanish, or Portuguese tomate, from Nahuatl tomatl.
Example Bank:

• Demonstrators threw rotten tomatoes at the car.

Cambridge Advanced Learner's Dictionary

Cambridge Advanced Learner's Dictionary - 4th Edition

tomato / təmɑ.təʊ /    / -meɪ.t̬oʊ / noun [ C or U ] ( plural tomatoes )

tomato A1 a round, red, sharp-tasting fruit with a lot of seeds, eaten cooked or uncooked as a vegetable, for example in salads or sauces

© Cambridge University Press 2013

Collins Advanced Learner’s English Dictionary

tomato

[təmɑ͟ːtoʊ, AM -me͟ɪ-]
tomatoes
N-VAR
Tomatoes are small, soft, red fruit that you can eat raw in salads or cooked as a vegetable.

Merriam-Webster's Advanced Learner's Dictionary

tomato

tomato/təˈmɑː.təʊ/ US /-ˈmeɪ.ţoʊ/
noun [C or U] plural tomatoes
a round red sharp-tasting fruit with a lot of seeds which is eaten cooked or raw as a savoury food.