verb

• (transitive) To collect into a mass or heap.
• (transitive) to gather a great quantity of; to accumulate.
  "to amass a treasure or a fortune"
• (intransitive) To accumulate; to assemble.

noun

• (obsolete) A large number of things collected or piled together.
  "[T]his Pillar [the "Compounded Order"] is nothing in effect, but a Medlie, or an Amaſſe of all the precedent Ornaments, making a nevv kinde, by ſtealth, and though the moſt richly tricked, yet the pooreſt in this, that he is a borrovver of all his Beautie."
• (obsolete) The act of amassing.
  "He [the general] must neuer permit the Captaines to depart from the place, where he made the Amasse and collection of the Companies, with their bands out of order or disseuered, although they should depart to some place neere adioyning, vnlesse he were forced by some occasion of great necessity and importance:"