to create (something) by mental or artistic labour
He composed a sonnet
to formulate and write (a piece of music)
to form (something) by putting it together
(usu in passive) to form the substance of (something); to make (something) up
to arrange (type) for printing; to set
to free (oneself) from agitation; to calm or settle (oneself)
archaic to settle (a point of disagreement)
[early French composer from Latin componere: see compound3]