invert

1. 1.

   An inverted arch (as in a sewer).

2. 2.

   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.

3. 3.

   The lowest point inside a pipe at a certain point.

4. 4.

   An elevation of a pipe at a certain point along the pipe.

5. 5.

   A skateboarding and snowboarding 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.

Connections

Learner notes