a portable shelter (usually of canvas stretched over supporting poles and fastened to the ground with ropes and pegs); "he pitched his tent near the creek"
work together on a common enterprise of project; "The soprano and the pianist did not get together very well"; "We joined forces with another research group"
cooperate as a traitor; "he collaborated with the Nazis when they occupied Paris"
showing extreme cupidity; painfully desirous of another's advantages; "he was never covetous before he met her"; "jealous of his success and covetous of his possessions"; "envious of their art collection"