Refers to the fruit/vegetable Solanum lycopersicum. Used in everyday contexts.
朝食にトマトを食べました。
I ate a tomato for breakfast.
このトマトはとても甘いですね。
This tomato is very sweet, isn't it?
I cut up a tomato for the salad.
The tomatoes in the field ripened red.
I'm growing tomatoes in my garden.
tomato sauce