The meaning of rivulet is a small stream. how to use rivulet in a sentence. Ryvilets. mom and baby collections. home home; circular focus search for: search circular focus latest post . home home. today s mom cozy cuddler pregnancy pillow. Rivulet definition, a small stream; streamlet; brook. see more. Synonyms for rivulet: beck, bourn, brook, brooklet, burn, creek, gill, rill. Riv·u·let (rĭv′yə lĭt) n. a small brook or stream; a streamlet. [possibly from italian rivoletto, diminutive of rivolo, small stream, from latin rīvulus, diminutive of.