I drove downtown to LAPD headquarters, Parker Center, and parked next to a cruiser.
Suddenly the ammo inside the cruiser started to pop off, fueled by the fire.
A cruiser shows up and eyes narrow and citizens often withdraw.
1670s, agent noun from cruise (v.), or, probably, borrowed from similar words in neighboring languages (e.g. Dutch kruiser, French croiseur), originally a warship built to cruise and protect commerce or chase hostile ships (but in 18c. often applied to privateers); meaning "one who cruises for sex partners" is from 1903, in later use mostly of homosexuals; as a boxing weight class, from 1920; meaning "police patrol car" is 1929, American English.