Occupied by staff, having members of staff.(adjective)
Simple past tense and past participle of staff.(verb)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "staffed" in a sentence
"It's a puente, so all the crossings will be minimally staffed from the 14th to the 19th, I'm sure."
"The catalog of what has gone wrong with our administration of the occupation of Iraq rivals the list of administration lies that led to the beginning of the war in Iraq, but today's Washington Post report on the way the Congressional Provisional Authority was staffed is a stunner."
"A permanent office, fully staffed, is the only way of not being forgotten in the constant parade seeking to tap this most intriguing of offshore markets."