in·tense / inˈtens/ • adj. 1. (of a condition, quality, feeling, etc.) existing in a high degree; forceful or extreme: the job demands intense concentration the heat was intense. ∎ (of an action) highly concentrated: a phase of intense activity. ∎ (of a color) very strong or deep: an intense blue.2. (of a person) feeling, or apt to feel, strong emotion; extremely earnest or serious: an intense young woman, passionate about her art. ∎ expressing or marked by strong emotion: a low, intense mutter.DERIVATIVES: in·tense·ly adv.in·tense·ness n.