(grammar) A compound word without spaces in it. Some examples: dishcloth, keyboard, pancake, waterproof.

(idiomatic) A person or thing that cannot be easily understood; someone or something incomprehensible or puzzling.

(idiomatic, originally US, colloquial) Used to indicate that one is almost correct or has almost succeeded, but not quite.

Alternative form of close, but no cigar

(of a group) Closely linked or connected, as by a common identity, culture, or bond.

(chiefly software) Whose constituent makeup, or source code, is not made publicly available.

Used other than figuratively or idiomatically: see cut, it, close. / (colloquial) To barely complete something.

(ufology) A supposed observation, or observation of evidence, of extraterrestrial beings or their craft.

(transitive) To terminate; to call the end of. / (transitive, marketing) Synonym of close (“to make a sale”) / (surfing) Of a wave, to break all at once, instead of progressively along its length.

Alternative form of close-minded