Entry 1 sense Webster, 1913 Criticaster /(krĭt"ĭk*ăs`tẽr)/ · Crit·ic·as·ter · IPA 01 n. A contemptible or vicious critic. 1. A contemptible or vicious critic. “The rancorous and reptile crew of poeticules, who decompose into criticasters.” — Swinburne.