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.

To turn (something) upside down or inside out; to place in a contrary order or direction.

“to invert a cup, the order of words, rules of justice, etc.”

To move (the root note of a chord) up or down an octave, resulting in a change in pitch.

To undergo inversion, as sugar.

Subjected to the process of inversion; inverted; converted.

“invert sugar”