ˈriverletrare. [f. river n.1 + -let.] A small river; a brook, stream, or rivulet. 1674N. Eng.Hist. & Gen.Reg. (1850) IV. 34, I give to my son..my house and home lot on the South side of the riverlet.1883R. Broughton Belinda i. vii, Here by the riverlet sits the floury mill.