(chemistry) A type of chemical bond where two atoms are connected to each other by the sharing of two or more electrons.

(now rare) Hidden, covered over; overgrown, sheltered. / (figuratively) Secret, surreptitious, concealed. / (law, historical) Under coverture.

A covering. / A disguise. / A hiding place. / Area of thick undergrowth where animals hide. / (ornithology) A feather that covers the bases of flight feathers.

present participle of cover

(countable) That which covers or conceals; a cover; something spread or laid over or wrapped about another. / (uncountable) Action of the verb to cover.

A letter or written communication that serves to introduce an accompanying document; especially, a letter that introduces a résumé or curriculum vitae.

protected by a covering or shelter

(idiomatic, figuratively) It is not possible to make reliable judgments about things or people by considering external appearances alone.

An amount by which something or someone is covered. / The amount of space or time given to an event in newspapers or on television.

An amount of money to be paid for entering a bar or restaurant where entertainment is provided.