Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “mental”

mental

adjective [not gradable]  /ˈmen·təl/ us  
of or about the mind, or involving the process of thinking: Stress can affect both your physical and mental health. Many people suffer from some form of mental illness during their lives. I made a mental note of her address (= I will try to remember it).
mentally
adverb [not gradable]  /ˈmen·təl·i/ us  
mentally ill
(Definition of mental from the Cambridge Academic Content Dictionary © Cambridge University Press)
What is the pronunciation of mental?
Add Cambridge dictionaries to your browser to your website

Definitions of “mental” in other dictionaries

Word of the Day

pint

a measure for liquid equal to about half a litre

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More