Square \Square\, v. t. [imp. & p. p. Squared; p. pr. & vb. n. Squaring.]

[Cf. OF. escarrer, esquarrer. See Square, n.]

1. To form with four sides and four right angles. --Spenser.

2. To form with right angles and straight lines, or flat surfaces; as, to square mason's work.

3. To compare with, or reduce to, any given measure or standard. --Shak.

4. To adjust; to regulate; to mold; to shape; to fit; as, to square our actions by the opinions of others.

Square my trial To my proportioned strength. --Milton.

5. To make even, so as leave no remainder of difference; to balance; as, to square accounts.

6. (Math.) To multiply by itself; as, to square a number or a quantity.

7. (Astrol.) To hold a quartile position respecting.

The icy Goat and Crab that square the Scales. --Creech.

8. (Naut.) To place at right angles with the keel; as, to square the yards.

To square one's shoulders, to raise the shoulders so as to give them a square appearance, -- a movement expressing contempt or dislike. --Sir W. Scott.

To square the circle (Math.), to determine the exact contents of a circle in square measure. The solution of this famous problem is now generally admitted to be impossible.

Source: Webster's Revised Unabridged Dictionary (1913)