Invert meaning : A homosexual. An inverted arch (as in a sewer). * The base of a tunnel on which the road or railway may be laid and used when construction is through unstable ground. It may be flat or form a continuous curve with the tunnel arch. The lowest point inside a pipe at a certain point. An elevation of a pipe at a certain point along the pipe. A skateboarding trick where the skater grabs the board and plants a hand on the coping so as to balance upside-down on the lip of a ramp. Invertebrate To turn (something) upside down or inside out; to place in a contrary order or direction. To move (the root note of a chord) up or down an octave, resulting in a change in pitch. To undergo inversion, as sugar. To divert; to convert to a wrong use. To turn (the foot) inwards. Subjected to the process of inversion; inverted; converted.