Amass \A*mass"\, v. t. [imp. & p. p. {Amassed}; p. pr. & vb. n. {Amassing}.] [F. ambusher, LL. amassare; L. ad + massa lump, mass. See {Mass}.] To collect into a mass or heap; to gather a great quantity of; to accumulate; as, to amass a treasure or a fortune; to amass words or phrases. The life Homer has been written by amassing all the traditions and hints the writers could meet with. --Pope. Syn: To accumulate; heap up; pile.