the outside / the outdoors; a space not surrounded by walls; an open space

(idiomatic, of a woman) To open oneself up to sexual intercourse.

plural of open house

plural of open day

A casual event where an institution is open for inspection by anyone interested.

plural of opelet

A bright-coloured European actinian (Anemonia or Anthea sulcata).

Alternative form of open-mouthed

A type of mine where rock or minerals are extracted from the earth by their removal from an open pit or borrow.

plural of open wound