Entry 5 senses · 4 variants Webster, 1913 Prill /prĭl/ · IPA /pɹɪl/ n. v. i. n. n. 01 n. The brill. 1. The brill.(Zool.) 02 v. i. To flow. 1. To flow.[Obs.] 03 n. A stream. 1. A stream.[Obs.] 04 n. A nugget of virgin metal. 1. A nugget of virgin metal.(Mining) 2. The button of metal from an assay.