noun

1. The conclusive victory in a game of chess that occurs when an opponent's king is threatened with unavoidable capture.

2. (by extension) Any losing situation with no escape; utter defeat.

verb

1. To put the king of an opponent into checkmate.

   “That jerk checkmated me in four moves!”

2. (by extension) To place in a losing situation that has no escape.

noun

1. A fellow, comrade, colleague, partner or someone with whom something is shared, e.g. shipmate, classmate.

2. (especially of a non-human animal) A breeding partner.

3. A friend, usually of the same sex.

   “He's my best mate.”

Synonyms: buddy, fellow, fere, friend, partner, sir

verb

1. To match, fit together without space between.

   “The pieces of the puzzle mate perfectly.”

2. To copulate.

3. To pair in order to raise offspring

Synonyms: couple, match, pair

verb

1. To confuse; to confound.

noun

1. The abovementioned plant; the leaves and shoots used for the tea

adjective

1. Friendly; having a friendship (with).

   “He is mates with my brother.”

Synonyms: chummy, chums, friendly, friends, pally, pals

noun

1. An evergreen tree, Ilex paraquariensis, native to South America, cultivated for its leaves.

2. A beverage, resembling tea, made from the dried leaves of this plant.

3. A cup of this drink.

Synonyms: maté tea, yerba mate, yerba maté