The ABCof a subject or activity is the parts of it that you have to learn first because they are the most important and basic.
...the ABC of Marxism. [+ of]
Synonyms: basics, principles, elements, essentials More Synonyms of ABC
2. countable noun
Children who have learned their ABC or their ABCs have learned to recognize, write, or say the alphabet.
[informal]
More Synonyms of ABC
ABC in British English1
noun
1. (plural in US)
the rudiments of a subject
2.
an alphabetical guide to a subject
3. (often plural in US)
the alphabet
ABC in British English2
abbreviation for
1.
(formerly, of weapons or warfare) atomic, biological, and chemical
2.
Australian Broadcasting Corporation
3.
American Broadcasting Company
4.
Audit Bureau of Circulation
5. Australian
Australian-born Chinese: a person with Chinese parents, born and raised in Australia
6. US
American-born Chinese: a person with Chinese parents, born and raised in the US
7. British
acceptable behaviour contract: a voluntary written agreement between someone who has been involved in anti-social behaviour and a local agency such as a council or police
ABC in American English1
(ˌeɪˌbiˈsi)
nounWord forms: pluralABC's [usually pl.]
1.
the alphabet
2.
the basic or simplest elements (of a subject); rudiments
ABC in American English2
1.
American Bowling Congress
2.
American Broadcasting Company
Examples of 'ABC' in a sentence
ABC
Research shows that, among ABC males in the eighteen to thirty club, he's the comedian of choice.
Tony Parsons MAN AND WIFE (2002)
1 (noun)
Definition
the basics of something
the ABC of Marxism
Synonyms
basics
principles
elements
essentials
fundamentals
teaching small children the fundamentals of road safety
rudiments
2 (noun)
Definition
the alphabet
By this age children should be able to count to ten and recite their ABC.
Synonyms
alphabet
By the age of two-and-a-half, he knew the alphabet.
letters
Additional synonyms
in the sense of fundamentals
teaching small children the fundamentals of road safety