Entry 2 senses · 2 variants Webster, 1913 Inrush · In·rush · IPA /ˈɪnˌɹʌʃ/ n. v. i. 01 n. A rush inwards; as, the inrush of the tide. 1. A rush inwards; as, the inrush of the tide. 02 v. i. To rush in. 1. To rush in.[Obs.]