con·dense / kənˈdens/ • v. 1. [tr.] make (something) denser or more concentrated: the limestones of the Jurassic age are condensed into a mere 11 feet. ∎  [usu. as adj.] (condensed) thicken (a liquid) by reducing the water content, typically by heating: condensed soup. ∎  express (a piece of writing or speech) in fewer words; make concise: he condensed the three plays into a three-hour drama. ∎  (in word processing) (of character spacing) reduced.2. [intr.] be changed from a gas or vapor to a liquid: the moisture vapor in the air condenses into droplets of water. ∎  [tr.] cause (a gas or vapor) to be changed to a liquid.DERIVATIVES: con·den·sa·ble adj.

condense increase the density of XV; reduce from vapour to liquid XVII. — (O)F. condenser or L. condensāre, f. condensus very dense; see CON-, DENSE.
So condensation XVII. — late L.