Not able to be accessed; out of reach; inconvenient. / Not able to be reached; unattainable.

(mathematics) An uncountable regular cardinal number that is a limit cardinal.

(transitive) To let someone or something come in; to admit someone or something in. / To divulge one's inner thoughts to (someone), making oneself emotionally vulnerable to them; to open up to (someone).

An archipelago and overseas territory of the United Kingdom in the middle of the Indian Ocean between Africa and Indonesia; created in 1965; currently used as a joint US/UK military base.

To experience a certain “fluttery” physical sensation in a person's stomach, associated with nervousness, uncertainty, anxiety, or apprehension.

(somewhat dated) Very tired. / (chiefly UK) With everything included. / (poker) Having no further stake to wager, but remaining active in a hand.

(poker) A hand where at least one player bets all of his or her chips. / (poker) A player who is all in.

(idiomatic) A person who will rescue a dangerous situation; a hero.

Alternative spelling of knight in shining armor

(transitive) to enter data by keyboarding