(music) the section of a movement (especially in sonata form) where the major musical themes first occur
an account that sets forth the meaning or intent of a writing or discourse; "we would have understood the play better if there had been some initial exposition of the background"
a systematic interpretation or explanation (usually written) of a specific topic
diffusion of molecules through a semipermeable membrane from a place of higher concentration to a place of lower concentration until the concentration on both sides is equal
a tool resembling a hammer but with a large head (usually wooden); used to drive wedges or ram down paving stones or for crushing or beating or flattening or smoothing
a light drumstick with a rounded head that is used to strike percussion instruments
a sports implement with a long handle and a head like a hammer; used in sports (polo or croquet) to hit a ball