to turn over; to put upside down; to upset; to place in a contrary order or direction; to reverse; as, to invert a cup, the order of words, rules of justice, etc.-to change the position of; -- said of tones which form a chord, or parts which compose harmony.-to divert; to convert to a wrong use.-to convert; to reverse; to decompose by, or subject to, inversion. see inversion, n., 10.-to undergo inversion, as sugar.-subjected to the process of inversion; inverted; converted; as, invert sugar.-an inverted arch.