n (countable) A group of people who live together, or one that is similar to one that is related by blood, marriage, law, or custom, or members of one's intimate social group.
n (countable) Any group or aggregation of things classed together as kindred or related from possessing in common characteristics which distinguish them from other things of the same order.
n (countable|music) A group of instrument having the same basic method of tone production.
n (countable|linguistics) A group of languages believed to have descended from the same ancestral language.