Entry 2 senses · 2 variants Webster, 1913 Coact · Co·act · IPA /kəʊˈakt/ v. t. v. i. 01 v. t. To force; to compel; to drive. 1. To force; to compel; to drive.[Obs.] “The faith and service of Christ ought to be voluntary and not coacted.” — Foxe. 02 v. i. To act together; to work in concert; to unite. 1. To act together; to work in concert; to unite.[Obs.] “But if I tell you how these two did coact.” — Shak.