1. (verb)tack fasten with tacks
"tack the notice on the board"
2. (verb)tack, wear round turn into the wind "The sailors decided to tack the boat"; "The boat tacked"
3. (verb)assemble, piece, put together, set up, tack, tack together create by putting components or members together
"She pieced a quilt"; "He tacked together some verses"; "They set up a committee"
4. (verb)baste, tack sew together loosely, with large stitches
"baste a hem"
5. (verb)append, tag on, tack on, tack, hang on fix to; attach
"append a charm to the necklace"
6. (verb)interchange, tack, switch, alternate, flip, flip-flop reverse (a direction, attitude, or course of action)