A state of disregarding or denying a problem or threat.

(slang) Very or intensely (in describing mental states).

(informal) Someone who is very interested in technology.

plural of head loss

The pressure lost in a hydraulic system as fluid moves through a pipeline.

(cycling) The part of a tubular bicycle's frame in which the front fork steerer tube is mounted.

A motorcycle's equivalent of a bicycle's head tube.

plural of head tube

(transitive) To put an end to; to defeat or frustrate (a scheme or project).

A vertical cylindrical revolving tool-holder for bringing different tools into action successively in a machine, as in a lathe.