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

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

(figuratively) Cognizant of any risks involved.

simple past tense and past participle of open someone's eyes

Third-person singular simple present indicative form of open someone's eyes

present participle of open someone's eyes

(transitive with to) (figuratively) To speak honestly and vulnerably about one's feelings. / To show great compassion.

plural of open-field test

A scientific test to gauge an animal's locomotor activity levels, anxiety, and willingness to explore, by placing the animal in an enclosed arena and observing its actions.

(UK) A double-deck bus with an open, or partially open, top deck.