A Quick and Simple Dictionary

invert

1. Verb.  (transitive) To turn (something) upside down or inside out.
2. Verb.  (transitive, music) To move (the root note of a chord) up or down an octave, resulting in a change in pitch.
3. Noun.  (archaic) A homosexual man.
4. Noun.  (context, architecture) An inverted arch (as in a sewer). *.
5. 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. invert (in'‑vert) The floor or bottom of the internal cross section of a closed conduit, such as an aqueduct, tunnel, or drain - The term originally referred to the inverted arch used to form the bottom of a masonry‑lined sewer or tunnel (Jackson, 1997) Wilson, W.E., Moore, J.E., (2003) ''Glossary of Hydrology,'' Berlin: Springer.
6. Noun.  (context, civil engineering) The lowest point inside a pipe at a certain point.
7. Noun.  (context, civil engineering) An elevation of a pipe at a certain point along the pipe.