Contact

[Sarah]

The property of two curves, or surfaces, which meet, and at thepoint of meeting have a common direction.

[Becky]

Contact in Orienteering. The act of relating the ground to the map and vice versa so that the competitor can see exactly where they are.

[Marquetta]

The state or condition of physical touching.

[Justin Bieber]

Aviation term: a verbal queue expressed by the pilot of a propeller-driven aircraft lacking a starter to a mechanic positioned forward of the engine, indicating that the pilot has connected the main electrical circuit of the aircraft via a switch in [the cockpit], and that [the mechanic] should manually rotate the [propeller] in order to start the engine.

[Luis Fok]

Used by military personnel to report [an encounter] with enemy forces. Enemy forces are not necessarily human enemy but can be enemy [IDF] (Indirect fire) ie Artillery, or [IEDs]/mines.

[Couch Potatoe]

Shortened form of [Contact High], which is getting a high from secondhand [marijuana] [smoke].

[Gregory]

A replacement term that can always be used instead of [high five], [pound] etc.
Contact works in any situation, e.g. if the person does not have [five fingers], or uses another part of their body.

[Kit]

[Blowing smoke] from a [blunt] into [anothers] face.

[Donald Trump]

Used in the military to [identify] visible [enemies].

See also: [Tango]