Definition of "fatigues"

He looked up, met gray eyes ringed with paintstick. She was wearing faded French orbital fatigues and new white sneakers.

1984, William Gibson, Neuromancer (Sprawl; book 1), New York, N.Y.: Ace Books, page 9

Ross: … why do you have to wear underwear tonight? / Joey: It's a rented tux, 'kay? I'm not gonna go commando in another man's fatigues.

1996, Friends (TV series), "The One Where No One's Ready" [3.02], Act 2, approx. 12 minutes (of 23)

The little green men were clearly professional soldiers by their bearing, carried Russian weapons, and wore Russian combat fatigues, but they had no identifying insignia. Vladimir Putin originally denied they were Russian soldiers; that April, he confirmed they were.

2019 March 18, Steven Pifer, Five years after Crimea’s illegal annexation, the issue is no closer to resolution‎, The Center for International Security and Cooperation