| Acronym | Definition |
|---|
| YAC | You Available to Chat? |
| YAC | Youth Advisory Council |
| YAC | Yeast Artificial Chromosome |
| YAC | Yards after Catch (football) |
| YAC | Yet Another Conference |
| YAC | Yahoo Audio Conferencing |
| YAC | yet Another Counter |
| YAC | Youth Advisory Committee |
| YAC | Yards after Contact (football) |
| YAC | Youth Advice Centre (UK) |
| YAC | Young Archaeologists Club (UK) |
| YAC | Young Artist Competition |
| YAC | Youth Action Committee (Canada) |
| YAC | Youth Activities Center |
| YAC | Youth Adult Committee |
| YAC | Young Adult Conference (Church of the Brethren conference for young adults) |
| YAC | Young Alumni Committee |
| YAC | Young Astronauts Club (band) |
| YAC | Young Astronauts Club |
| YAC | Yuma Agricultural Center (Arizona) |
| YAC | Yukon Arts Centre (Whitehorse, Yukon Canada) |
| YAC | Young Adult Council |
| YAC | You're Always Connected |
| YAC | Young Artists' Concert (various locations) |
| YAC | Youth Adult Council (Young Religious Unitarian Universalist regional governance body) |
| YAC | Yet Another Club |
| YAC | Young Adult Class |
| YAC | You Are Cool |
| YAC | Yards after Completion (football) |
| YAC | Young Actors Camp (Claremont, CA) |
| YAC | Yet Another Catfight |
| YAC | Yukon Arts Council (Canada) |
| YAC | Youngtimers Armorique Club (French car club) |
| YAC | Youth Artist Competition |
| YAC | Yet Another Creation |