noun
Common
ac
Ac (noun) means Common abbreviation for air conditioning or an air conditioner. Example: “The AC in our office broke down during the heatwave.”
noun
1
Common abbreviation for air conditioning or an air conditioner.
"The AC in our office broke down during the heatwave."
"Does your car have AC, or do we need to open the windows?"
"Can you turn the AC up? It's boiling in here."
How to use ac
Learner’s notesIn plain EnglishShort for air conditioning/air conditioner — this is by far the most common everyday use.
Common mistake
Also used as an abbreviation for "alternating current" in electrical contexts, and for other unrelated terms depending on the field — check context.
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Word forms
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The _____ in our office broke down during the heatwave.
Etymology
An abbreviation, most commonly for "air conditioning" in everyday use.
Synonyms
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Frequently asked questions
What does “ac” mean?
The word “ac” means common abbreviation for air conditioning or an air conditioner. In plain terms, short for air conditioning/air conditioner — this is by far the most common everyday use.
How do you use “ac” in a sentence?
Here is “ac” used in a sentence: “Can you turn the AC up? It's boiling in here.”
What part of speech is “ac”?
“Ac” is a noun.
Is “ac” a common word?
“Ac” is a fairly common word in modern English.
What is the difference between "AC" and "HVAC"?
AC is a common abbreviation for air conditioning or an air conditioner, which cools indoor air. HVAC is broader, standing for heating, ventilation and air conditioning, so it covers the whole climate system rather than just the cooling part.
Should "AC" be written in capital letters?
As an abbreviation of air conditioning, AC is usually written in capitals, though you may also see "a/c" or the informal "air con." Capital "AC" is the most widely recognised form in everyday writing.
What is the difference between "AC" and "air con"?
Both are short for air conditioning, but AC is more common in American English while "air con" is typical in British and Australian usage. They refer to the same thing: a system or unit that cools indoor air.
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