1. fastened or attached with tacks (small nails)
2. added or attached something as an addition
3. changed direction while sailing by turning the bow through the wind
Usage: nautical

Examples

• She tacked the poster to the bulletin board.
• The notice was tacked to the door with thumbtacks.
• Congress tacked the amendment onto the spending bill.
• He tacked a personal note to the end of his letter.
• The sailboat tacked against the wind to reach the harbor.
• They tacked back and forth across the bay.
• The captain tacked to starboard to avoid the rocks.