What does intensity mean?
Intensity is a noun meaning the strength, degree, or concentration of a quality or experience. People use it for emotions, sensations, light, sound, effort, and other measurable or perceptible qualities. Saying that a singer performs with intensity emphasizes power and concentration, while discussing the intensity of radiation or exercise refers to its level or force. The word is useful because it names the strength of a quality without requiring a more specific technical term, though the intended sense depends on context. In emotional descriptions, intensity can suggest that a feeling is unusually powerful; in technical writing, it often identifies a measured property. It is broadly understood in British and American English and is especially common in formal, scientific, and analytical registers.
nounThe degree or strength of something, especially emotion, sensation, light, sound, or activity. It can also refer to the concentration or force with which an effort or process is carried out.
- The degree or strength of a sensation, emotion, or experience.
- The brightness or concentration of light, sound, or another physical quantity.
- The force, energy, or concentration devoted to an activity or undertaking.
"The intensity of the sunlight made it difficult to read the screen."
"She responded to the criticism with surprising intensity."
"Increasing the intensity of the exercise should be done gradually."
The plural is used when referring to different levels, strengths, or degrees of a quality.
"The two recordings have noticeably different intensities."
From a faint flicker to a blinding blaze, intensity describes how strongly a sensation, emotion, or activity is felt.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does intensity come from?
The word comes through French from Latin intensities, an abstract noun formed from intensus, meaning “stretched,” “tense,” or “strong.” The underlying Latin root is tendere, “to stretch,” which is also the source of related words such as tension and tendency. In English, the term developed from a general sense of strength or degree into its modern uses for emotion, sensation, and measurable physical quantities.
Related word forms
How intensity is actually used
The word is common in formal and technical contexts. In discussions of emotion, it often implies a powerful or concentrated feeling; in science and technology, it commonly describes measurable strength, brightness, or level.
Easily confused with intensity
Intensity is the degree or strength of a quality, whereas intense is an adjective describing something that has a strong or concentrated quality.