/a ta shay", at'euh-/ or, esp. Brit., /euh tash"ay/
n.
1. a diplomatic official attached to an embassy or legation, esp. in a technical capacity: a commercial attaché; a cultural attaché.
2. a military officer who is assigned to a diplomatic post in a foreign country in order to gather military information: an air attaché; an army attaché; a naval attaché.
3. Also, attache . See attaché case .
[ 1825-35; attacher to ATTACH ]