What does «cuñado» mean in Spanish?

Brother or sister of one spouse to the other; sibling-in-law. In other words: sibling of a person's spouse and spouse of a person's sibling.

Examples of use in Spanish: "mi cuñado es el hermano de mi esposa".

"mi cuñada es la hermana de mi esposo y para ella yo soy la cuñada por ser esposa de su hermano".
Affectionate way of addressing a friend.

♦ Used in: Bolivia - Colombia - Nicaragua - Peru
(¡adiós cuñado!) Locution addressed to the man accompanying a woman to express a compliment to her.

♦ Used in: Colombia - Honduras - Mexico - Nicaragua