- occurring or existing in a high degree; very strong; violent, extreme, sharp, vivid, etc.: an intense light
- strained to the utmost; strenuous; earnest; fervent; zealous: intense thought
- having or showing strong emotion, firm purpose, great seriousness, etc.: an intense person
- characterized by much action, emotion, etc.
Origin of intenseMiddle English from Middle French from Classical Latin intensus, past participle of intendere: see intend