existing or occurring in a high or extreme degree

intense heat.

acute, strong, or vehement, as sensations, feelings, or emotions

intense anger.

of an extreme kind; very great, as in strength, keenness, severity, or the like

an intense gale.

having a characteristic quality in a high degree

The intense sunlight was blinding.

strenuous or earnest, as activity, exertion, diligence, or thought

an intense life.

exhibiting a high degree of some quality or action.

having or showing great strength, strong feeling, or tension, as a person, the face, or language.

susceptible to strong emotion; emotional

an intense person.

(of color) very deep

intense red.

Photography . dense ( def. 4 ) .