a military base in a combat zone, from which artillery, rockets, etc. are fired
firebase in American English
(ˈfaiᵊrˌbeis)
noun
Military
an artillery base, esp. one set up quickly to support advancing troops or to forestall enemy advances
Word origin
[1965–70; fire + base1]This word is first recorded in the period 1965–70. Other words that entered Englishat around the same time include: Coriolis effect, Finlandization, double-book, red-eye, stun gun