Entry 2 senses · 2 variants Webster, 1913 Ploy /ploi/ · IPA /plɔɪ/ n. v. i. 01 n. Sport; frolic. 1. Sport; frolic.[Prov. Eng. & Scot.] 02 v. i. To form a column from a line of troops on some designated subdivision; -- the opposite of deploy. 1. To form a column from a line of troops on some designated subdivision; -- the opposite of deploy.(Mil.)