1. a loose shirt worn over another shirt or garment

Examples

• He wore a flannel overshirt over his t-shirt.
• The denim overshirt was perfect for the cool evening.
• She buttoned up her cotton overshirt before heading outside.
• The plaid overshirt added a casual layer to his outfit.
• He left his overshirt unbuttoned for a relaxed look.
• The lightweight overshirt was ideal for spring weather.