noun pl. ABC's
- the alphabet
- the basic or simplest elements (of a subject); rudiments
- American Bowling Congress
- service mark for American Broadcasting Company
See ABC in American Heritage Dictionary 4
- The alphabet. Often used in the plural: learned her ABCs when she was three years old.
- The rudiments of reading and writing. Often used in the plural.
- The rudiments of a subject. Often used in the plural: taught the ABCs of geometry.
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