mentally

adverb

men·​tal·​ly ˈmen-tᵊl-ē 

1

: in the mind

Mentally he promised himself that he would never again use a collar on any living creature.

—Brian Jacques

: using the mind

able to mentally calculate large sums

2

: with regard to the mind or its capacity

physically and mentally healthy people

a mentally competent adult

a mentally challenging activity

… if you try to hide the fact that you feel mentally inadequate, and so go around making jokes about your own dullness and acting as if it didn't bother you at all …

—David Foster Wallace

I felt too hungry and tired and mentally overloaded to ask any more questions.

—Rick Riordan

Examples of mentally in a Sentence

Recent Examples on the Web

Society perceives fathers who kill to be evil, but certain mothers appear to be presumed mentally ill. — Dr. Susan Hatters Friedman, Hartford Courant, 23 Aug. 2026

Feeling mentally drained or physically exhausted is something everyone experiences from time to time. — Daryl Austin, USA Today, 21 Aug. 2026

McCollough was also struggling to keep up with Watts’ around-the-clock partying, which began taking a toll on her physically and mentally. — Cheyenne Roundtree, Rolling Stone, 20 Aug. 2026

Brain Fog Feeling mentally foggy or having difficulty concentrating could be a subtle sign that your omega-3 levels are low. — Lindsay Curtis, Verywell Health, 20 Aug. 2026

Word History

First Known Use

15th century, in the meaning defined at sense 1

Rhymes for mentally

• accidentally
• detrimentally
• fundamentally
• governmentally
• incidentally
• incrementally
• instrumentally
• sentimentally
• temperamentally
• coincidentally
• environmentally
• experimentally