Definitions:

1. A simple, portable meal brought from home and typically packed in a paper sack or lunch bag, often including items like sandwiches, fruit, snacks, and a drink. NOUN
   • Workers often bring a sack lunch to save money and time.
2. Refers to a packed meal, usually carried in a paper bag or sack, typically eaten away from home, such as at school, work, or on a trip. NOUN
   • She packed a sack lunch for her son to take on the school field trip.

Synonyms:

• bag lunch
• brown-bag lunch
• packed lunch