What is the definition of base?

Answer 1

1. (n) (chem) A substance with a hydroxyl ion; a substance which neutralizes an acid.

2. (n) (math) The number by which units are grouped in a number system

3. (n) (military) The area from which a military unit conducts its operations ("All your base are belong to us")

4. (n) (sport) In the game of Baseball, three bags which provide a safe area for runners.

5. (n) The supporting structure for something, such as a statue or pillar.

6. (v) To build upon, figuratively. "Our success is based on good service."

7. (adj) Inferior, morally corrupt.

8. (adj) Fundamental, most basic.
Mathematics

A base is the amount of characters (1,2,3,4,5,6,7,8,9,0,A,B,C etc.) there are in a counting system.

We generally use base 10. It uses the characters 1,2,3,4,5,6,7,8,9 and 0.

Examples of other bases:

Base 2-Binary

Base 1-Unary

Base 3-Trinary

Base 8-Octal

Base 10-Decimal

Base 13-Tridecimal

Base 16-Hexadecimal

These all use characters.

They start with 0, then 1, then 2 ... 9, then A (10), B(11), C(12).

And so on

Chemistry

A base is a chemical compound containing the anion OH- and accepting hydrogen ions.