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base

base

1 3.4
The side of a shape from which its height is measured
  • noun
  • /beɪs/
  • Specialized
: base
  • In geometry class, we learned about the base of different shapes, including squares and triangles.
  • side as the base
  • width of the base
  • diameter at the base

Examples

  • Then to find the surface area though, I need to find the area of the base, correct?

  • Sunkoro pounds the clay over a mold to form the base of a pot.

    Academic text (1994)
  • Jones, come in for base camp.

  • The third option is just over there, at the base of that hill.

  • Next, we set up four posts around the base and fill the pit with earth.

    Fiction book (1998)
  • And at the base of the triangle, there's a tree.

  • The creature reached the steps at the base of the pulpit.

    Fiction book (1997)
  • A large pagoda forest grew along the base of the rugged alluvial fan.

    Fiction book (2001)
  • To calculate the area of the triangle, we need the length of the base and the height.

  • The artist started with a strong base for the sculpture to ensure stability.

Idioms

5 7.7

To make the first real progress in work or a relationship

2 9.6

Close to having sex with someone you are dating

A funny phrase people use online to say they have won

To turn completely upside down while falling

Compounds

58 3.4

A place at the start of a trip for climbing or hiking where people rest and keep supplies

air base
  • Specialized
55 3.3

A military place where people keep, fix, and fly planes and helicopters

47 3.2

A group of people who strongly support someone like a singer or sports team

36 3.4

The main office where a company or group does its work

31 3.7

The second of four bases a runner touches when running to score

28 2.4

The first of four points on the field that a runner must touch to score

23 3.0

A white square on the field at the third corner that a runner must touch to score

tax base
  • Specialized
20 4.2

The total value of income, goods, or sales a government can collect money from

18 2.6

A place where soldiers live, train, and work

16 3.1

A player who stands near the third corner and stops balls hit there

A place where people plan and start activities like a military camp or company office

13 3.3

A hit that lets the batter reach base safely, not because of an error or fielder's choice

knowledge base
  • Specialized
11 3.4

A collection of information about a subject that helps people or companies find answers

10 3.1

A player who stands at first base to catch throws and get runners out

first base
  • Informal
9 4.4

An early step toward reaching a goal

8 4.2

A player who stands near second base and catches or stops ground balls

8 8.0

A stage in a relationship when people touch above the waist

base pair
  • Specialized
8 3.9

Two matching chemical parts in DNA or RNA that join the two strands, for example adenine with thymine

6 3.4

A place where the navy keeps, fixes, and supplies its ships

5 3.0

A flat rubber square that the batter stands beside and runners touch to score

3 5.5

A key interest rate set by the Bank of England that other loan rates follow

3 5.9

The number of a company's products that people use now, like devices or software

base runner
  • Specialized
2 3.5

A batting team player on base or running to reach a base

base metal
  • Specialized
2 4.0

A common metal like iron or copper that is not as valuable as gold

base on balls
  • Specialized
1 5.5

An advance to first base after a batter receives four pitches outside the strike zone

1 4.8

A military place where people keep, fix, and send rockets into the sky

A type of paint that uses water instead of oil

two-base hit
  • Specialized
1 4.2

A baseball play when the batter reaches second base safely

acid-base balance
  • Specialized
1 4.2

The amount of acids and bases in the body that keeps fluids at the right pH

1 5.1

A baseball hit that lets the batter reach third base safely

prisoner's base
  • Baby Talk
1 8.4

A children's game where two teams try to tag players from the other team and bring them to their base

acid-base equilibrium
  • Specialized
1 4.8

A balance of acids and bases in the body that keeps it working

acid-base indicator
  • Specialized
1 4.2

A chemical that changes color to show if a liquid is acidic or basic

copper-base alloy
  • Specialized
1 5.1

A metal made mostly of copper mixed with other metals like tin or zinc

nickel-base alloy
  • Specialized
1 6.0

A metal made mainly of nickel that resists very high heat and chemical damage

base wallah
  • Indian
9.9

A person who manages supplies and daily tasks at a base, like transport and housing

fifth base
  • Offensive
9.9

A slang phrase for having sex as the final step in dating

rubber-base paint
  • Specialized
4.2

A water-based paint that stays flexible, lasts a long time and resists moisture

Surface Forms

base singular
bases plural

Etymology

Base in geometry comes from Greek basis, 'step' or 'foundation', and it is the side you use as the 'bottom' when you measure height. That is why area is often 'base times height'.