One who or that which kills. / (figuratively) That which causes stress or is extremely difficult, especially that which may cause failure at a task.

(slang) Excellent, very good, cool. / Causing death, destruction, or obliteration. / Distressing, uncomfortable.

(military) A person who is killed in action.

(military) Initialism of killed in action.

A young goat. / Of a female goat, the state of being pregnant: in kid. / Kidskin. / (uncountable) The meat of a young goat. / A young antelope.

(transitive, colloquial) To make a fool of (someone). / (transitive, colloquial) To dupe or deceive (someone). / (transitive, colloquial) To make a joke with (someone).

A fagot; a bundle of heath and furze.

In the International System of Units and other metric systems of units, multiplying the unit to which it is attached by 1,000. Symbol: k

(medicine) A calculus in the kidney.

(Britain, slang) To undress or be naked.