The meaning of rivulet is a small stream. how to use rivulet in a sentence. Rivulet meaning: 1. a very small stream or flow of liquid: 2. a very small stream or flow of liquid: . learn more. Synonyms for rivulet: beck, bourn, brook, brooklet, burn, creek, gill, rill. Mom and baby collections. the mom brain therapist on instagram has anyone been on the receiving end of a timeline. Rivulet definition, a small stream; streamlet; brook. see more.