piece n. - formal or elaborate arrangement, esp. In art or literature.

- fireworks arranged on scaffolding etc.

- square n. Right-angled triangular plate for drawing lines, esp. At 90°, 45°, 60°, or 30°.

- theory n. The study or use of sets in mathematics.

- v. (-tt-; past and past part. Set) 1 put, lay, or stand in a certain position etc.

- apply (one thing) to (another) (set pen to paper).

- a fix ready or in position. B dispose suitably for use, action, or display.

- a adjust (a clock or watch) to show the right time. B adjust (an alarm clock) to sound at the required time.

- a fix, arrange, or mount. B insert (a jewel) in a ring etc.

- make (a device) ready to operate.

- lay (a table) for a meal.

- style (the hair) while damp.

- (foll. By with) ornament or provide (a surface). 10 make or bring into a specified state; cause to be (set things in motion; set it on fire).

- n. - group of linked or similar things or persons.

- section of society.

- collection of objects for a specified purpose (cricket set; teaset).

- radio or television receiver.

- (in tennis etc.) Group of games counting as a unit towards winning a match.

- math. Collection of things sharing a property.

- direction or position in which something sets or is set.

- slip, shoot, bulb, etc., for planting.