Entry 1 sense Webster, 1913 Torrential /tôr-ĕn'-shəl/ · Tor·ren·tial · IPA /tɔˈɹɛn.t͡ʃəl/ 01 a. Of or pertaining to a torrent; having the character of a torrent; caused by a torrent . 1. Of or pertaining to a torrent; having the character of a torrent; caused by a torrent .[R.]