square
nounDefinition of square
(Entry 1 of 4)
1
: an instrument having at least one right angle and two straight edges used especially to lay out or test right angles
2
: a rectangle with all four sides equal
3
: any of the quadrilateral spaces marked out on a board for playing games
4
: the product of a number multiplied by itself
5a
: an open place or area formed at the meeting of two or more streets
b
: block sense 6a
6
: a solid object or piece approximating a cube or having a square as its largest face
7
: an unopened cotton flower with its enclosing bracts
8
: a person who is conventional or conservative in taste or way of life
9
: a square meal
ate three squares a day
on the square
out of square
1
: at right angles
2
: in a fair open manner : honestly
: not at an exact right angle
square
adjective
squarer;
squarest
Definition of square (Entry 2 of 4)
1a
: having four equal sides and four right angles
b
: forming a right angle
square corner
c
: having a square base
a square pyramid
2
: raised to the second power
3a
: being approximately a cube
square cabinet
b
: having a shape that is broad for the height and rectangular rather than curving in outline
square shoulders a square, thick, hardworking man— Maria Edgeworth
c
: rectangular and equilateral in section
square tower
4a
: being or converted to a unit of area equal in measure to a square each side of which measures one unit of a specified unit of length
a square foot
— see Metric System Table, Weights and Measures Table
b
: being of a specified length in each of two equal dimensions
10 feet square
5a
: exactly adjusted : precisely constructed or aligned
c
: leaving no balance : settled
e
: substantial, satisfying
square meal
f
: being unsophisticated, conservative, or conventional
6
: set at right angles with the mast and keel
—used of the yards of a squarerigged ship
square
verb
squared;
squaring
Definition of square (Entry 3 of 4)
1a
: to make square or rectangular
square a building stone
b
: to test for deviation from a right angle, straight line, or plane surface
2
: to bring approximately to a right angle
squared his shoulders
3a
: to multiply (a number) by itself : raise to the second power
b
: to find a square equal in area to
square a circle
4
: to regulate or adjust by or to some standard or principle
square our actions by the opinions of others— John Milton
6
: to mark off into squares
1
: to agree precisely : correspond
your actions should square with your words
2
: to settle matters
especially
: to pay the bill
square
adverbDefinition of square (Entry 4 of 4)
1
: in a straightforward or honest manner
2a
: so as to face or be facetoface
b
: at right angles
3
: with nothing intervening : directly
ran square into it
4
: in a firm manner
looked her square in the eye
5
: in a square shape
Keep scrolling for more
Keep scrolling for more
Keep scrolling for more
Keep scrolling for more
Test Your Vocabulary
Where in the World? A Quiz

 What language does pajama come from?
Can you spell these 10 commonly misspelled words?
TAKE THE QUIZTest Your Knowledge  and learn some interesting things along the way.
TAKE THE QUIZLove words? Need even more definitions?
MerriamWebster unabridged
Words at Play
Ask the Editors
Word Games

Where in the World? A Quiz
Do you know what languages these words come from?
Take the quiz 
Advanced Vocabulary Quiz
Tough words and tougher competition.
Take the quiz 
Spell It
Can you spell these 10 commonly misspelled words?
Take the quiz 
Bee Cubed
Listen to the words and spell through all three levels.
Play the game
Share square
Resources for square