base (EN)

noun, verb, adjective

noun “base”

1. the bottom or supporting part of something
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   The vase stood securely on a wooden base.
2. a place where military forces are stationed and operations are conducted
   She was stationed at an air force base overseas.
3. the main place where a company or organization operates; headquarters
   The company's base is located in New York City.
4. a substance that reacts with acids to form a salt and water
   In chemistry class, we learned that sodium hydroxide is a strong base.
5. the main ingredient in something
   The sauce has a base of tomatoes and herbs.
6. the starting point or foundation for an idea or theory
   His argument has a solid factual base.
7. (in mathematics) a number used as the foundation in a system of counting or calculations
   Binary code uses base 2 instead of base 10.
8. (in baseball) one of the four positions a player must reach to score a run
   He hit the ball and ran to first base.
9. (in biology) one of the molecules that form part of DNA or RNA
   The sequence of bases in DNA determines genetic information.
10. the person who supports others in acrobatics or cheerleading
    As the base, she lifted the flyer into the stunt.

verb “base”

1. to use something as the foundation or starting point for something else
   The novel is based on a true story.
2. to have a particular place as the main location of operation
   The company is based in London.
3. (in acrobatics or cheerleading) to act as the person who supports others
   She bases her teammate during the stunt routine.

adjective “base”

1. lacking moral principles; dishonorable or immoral
   He was arrested for his base actions.
2. of low quality or inferior
   The tools were made of base metal.