noun
convenience store bento; convenience store lunch box
Refers to a pre-packaged meal sold at a convenience store, typically eaten for lunch or a quick meal.
昼食はコンビニ弁当で済ませた。
I made do with a convenience store bento for lunch.
弁当 is a general term for a boxed meal, while コンビニ弁当 specifically refers to one bought at a convenience store.
Compound of コンビニ (convenience store) and 弁当 (bento, boxed meal).