- the formation of a word, as cuckoo or boom, by imitation of a sound made by or associated with it's referent
- a word so formed
- Rhetoric. the use of imitative and naturally suggestive words for rhetorical effect.
- full of lumps: lumpy gravy.
- covered with lumps, as a surface.
- heavy or clumsy, as in movement or style; crude: a lumpy gait; a lumpy narrative.