Entry 1 sense Webster, 1913 Pervasive /(pẽr*vā"sĭv)/ · Per·va·sive · IPA /pɚˈveɪ.sɪv/ 01 a. Tending to pervade, or having power to spread throughout; of a pervading quality. 1. Tending to pervade, or having power to spread throughout; of a pervading quality.