plural of open air museum

Alternative form of open-door policy

(idiomatic, management, politics) A policy or usual practice, by a person in authority, of permitting subordinates or constituents to visit his or her office unannounced and at any reasonable time for the purpose of discussing matters of concern.

plural of open proxy server

Alternative form of open the kimono

(historical, plural in form) Wide-legged breeches ending below the knee.

(idiomatic) A redundant activity.

plural of open-air museum

(euphemistic) To defecate.

(figuratively) Cognizant of any risks involved.