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impulse

/ˈɪmpʌls/

When used to describe a sudden urge, "impulse" is often used with the preposition "on" (e.g., "on an impulse"), meaning the action was not planned. In scientific contexts, such as physics or biology, the word is more technical and refers to a specific physical measurement or signal rather than a feeling.

💬Trò chuyện

🎬Tuesday afternoon, Maya is at her desk while Ryan is procrastinating on his chores.
Ryan

Just bought a 70-inch TV on an impulse. My bad.

Ryan
Maya
Maya

You're actually out of your mind. You can't even pay rent.

💡
Ryan uses 'on an impulse' to describe a sudden, unplanned purchase, while Maya responds with the idiom 'out of your mind' to express that his behavior is irrational or crazy, highlighting her role as the pragmatic reality-check for Ryan.

Ý nghĩa

noun

A sudden strong and unreflective urge or desire to act.

"On an impulse, she bought a ticket to Paris."

noun

A pulsing force or signal, especially a nerve impulse or electrical current.

"The brain sends an electrical impulse to the muscles to trigger movement."

noun

In physics, the change in momentum of an object caused by a force acting over a period of time.

"The total impulse is calculated as the integral of force over time."

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Last Updated: May 22, 2026Report an Error