Entry 2 senses · 2 variants Webster, 1913 Formicate · For·mi·cate · IPA /ˈfɔː(ɹ)mɪkeɪt/ a. v. i. 01 a. Resembling, or pertaining to, an ant or ants. 1. Resembling, or pertaining to, an ant or ants.(Zool.) 02 v. i. To creep or crawl like ants; swarm with, or as with, ants. 1. To creep or crawl like ants; swarm with, or as with, ants. “An open space which formicated with peasantry.” — Lowell.