adjective C1 Advanced Uncommon

acidic

uh-SIH-dihk

Acidic (adjective) means having the properties of an acid; sour or having a pH below 7. Example: “Lemon juice is highly acidic.”

adjective

Having the properties of an acid; sour or having a pH below 7.

"Lemon juice is highly acidic."

"Acidic soil suits plants like blueberries and azaleas."

How to use acidic

Learner’s notes

In plain EnglishDescribes something that behaves like or contains an acid — sour-tasting or low on the pH scale.

Common pairings

acidic soil acidic foods highly acidic

Word forms

more acidic comparative, most acidic superlative

Study it as flashcards or scroll it in Flow — saved to your collection.

Test yourself on “acidic” A quick quiz — meaning, synonyms & usage →

Fill the gap

Can you complete this real example?

Lemon juice is highly _____.

Etymology

From "acid" plus the adjective ending "-ic."

Frequently asked questions

What does “acidic” mean?

The word “acidic” means having the properties of an acid; sour or having a pH below 7. In plain terms, describes something that behaves like or contains an acid — sour-tasting or low on the pH scale.

How do you pronounce “acidic”?

“Acidic” is pronounced uh-SIH-dihk (/əˈsɪ.dɪk/ in IPA).

How do you use “acidic” in a sentence?

Here is “acidic” used in a sentence: “Lemon juice is highly acidic.”

What part of speech is “acidic”?

“Acidic” is an adjective.

Is “acidic” a common word?

“Acidic” is an uncommon word in modern English, usually learned at around the C1 level.

Featured in

Vocabulary lists that include acidic:

Words that end with C