Entry 2 senses · 2 variants Webster, 1913 Outgush · Out·gush · IPA n. v. i. 01 n. A pouring out; an outburst. 1. A pouring out; an outburst. “A passionate outgush of emotion.” — Thackeray. 02 v. i. To gush out; to flow forth. 1. To gush out; to flow forth.