an international organization of independent Arab states formed in 1945 to promote cultural and economic and military and political and social cooperation
a member of a Semitic people originally from the Arabian peninsula and surrounding territories who speaks Arabic and who inhabits much of the Middle East and northern Africa
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"