Noun

(wikipedia commando) (en-noun)

A small fighting force specially trained for making quick destructive raids against enemy-held areas.

* 1977 , (Alistair Horne), A Savage War of Peace , New York Review Books 2006, p. 89:

The most important objective was at Batna itself, where a group of three commandos each comprising ten men was to attack Deleplanque's sub-prefecture [...].

A commando trooper

(historical) An organized force of Boer troops in South Africa; a raid by such troops

Noun

(en noun)

One who operates.

*

, title=(The Celebrity), chapter=1 , passage=The stories did not seem to me to touch life. […] They left me with the impression of a well-delivered stereopticon lecture, with characters about as life-like as the shadows on the screen, and whisking on and off, at the mercy of the operator .}}

A telecommunications facilitator whose job is to establish temporary network connections.

(mathematics) A function or other mapping that carries variables defined on a domain into another variable or set of variables in a defined range.

Chinese whispers.

(informal) A person who is adept at making deals or getting results, especially one who uses questionable methods.

A member of a military Special Operations unit.

(computing) The administrator of a channel or network on IRC.

(linguistics) A kind of expression that enters into an a-bar movement dependency and is said to bind a variable.

In the sentence "What did Bill say he wants to buy?", "what" is an operator , binding a phonetically empty variable.