definition of
tack

[1] #1 tack v. fasten with tacks; "tack the notice on the board". wn

[2] #2 tack v. [wear round] turn into the wind; "The sailors decided to tack the boat"; "The boat tacked". wn

[3] #3 tack n. the heading or position of a vessel relative to the trim of its sails. wn

[4] #4 tack n. a short nail with a sharp point and a large head. wn

[5] #5 tack n. [stable gear, saddlery] gear for a horse. wn