half-mast

Short definition from Wiktionary

Noun

1. 1
   The lowered position, half the height of a mast, at which a flag is flown when mourning, especially expressing respect for the deceased.
2. 2
   The lowered position of anything.
3. 3
   An unfashionably short length of a pair of trousers.
4. 4
   The state of having a partially erect penis.
5. 5
   Alternative form of half-mast.

Verb

1. 1
   To fly a flag in this position.