verb To turn (something) upside down or inside out; to place in a contrary order or direction; to make (something) the opposite of itself.
to invert a cup, the order of words, rules of justice, etc.
verb To move (the root note of a chord) up or down an octave, resulting in a change in pitch.
verb To undergo inversion, as sugar.
verb To divert; to convert to a wrong use.
verb To turn (the foot) inwards.
noun An inverted arch (as in a sewer).
noun 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.
noun The lowest point inside a pipe at a certain point.