The 1623 published collection of William Shakespeare's plays. The first such collection printed in folio format.

plural of first baseman

The principal minister of a ruler or state. / (Canada, often in plural) The prime minister or a provincial or territorial premier.

(Canada) The indigenous peoples of Canada (typically not including Inuit or Metis); Indians. / (Canada, less common) The indigenous peoples of any country or region.

plural of First Nation

(military) The second lowest rank of a commissioned officer in the United States Army, Air Force, or Marine Corps, ranking above a second lieutenant and below a captain. The rank of first lieutenant is equivalent to the naval rank of lieutenant junior grade.

(rugby) The first player to receive the ball, from a scrum-half (or acting scrum-half). This is often the fly-half, but may be a different player if the fly-half is unavailable, or a forward who will drive.

The ordinal form of the number ninety-one, describing a person or thing in position number 91 of a sequence.

One of ninety-one equal parts of a whole.

Someone in the first team.