1
: very great in degree : very strong
intense [=extreme] heat/cold/pain/pressure
He shielded his eyes from the intense flash of light.
She has an intense dislike for/of her husband's friend.
intense anger
2
a
: done with or showing great energy, enthusiasm, or effort
After many years of intense study, he received his medical degree.
an intense effort
School reform is a subject of intense debate.
The work requires intense concentration.
b
of a person
: very serious
He was an intense young man who was very determined to do well in school.
Cite this Entry
“Intense.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/intense. Accessed 15 Apr. 2026.
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