Brainwave

Part of speech: noun

Definitions

1. A sudden burst of inspiration may reveal a novel thought or solution
2. An unexpected flash of creativity or understanding that comes to mind quickly
3. A rapid burst of mental clarity or inventive thinking that provides a new perspective

Etymology: "Brainwave" is a plain compound: "brain" joined to "wave," so the word is literally a wave in the brain. The sense of a sudden burst of insight comes from the idea of a surge of activity passing through the mind, the way a wave rises and breaks. The "brain wave" sense of electrical activity measured by instruments came later, and the figurative sense of a flash of inspiration grew out of the same picture of a sudden rush of thought. The word's history in English is short and straightforward, so the most useful detail is that the components are ordinary English words put together. "Wave" has long meant a moving swell of water and, by extension, any rising and falling motion, which is what lets the figure of speech work: a thought seems to swell up and wash over a person all at once.

Synonyms: insight, idea, innovation, invention, epiphany

Antonyms: confusion, ignorance, unawareness, misunderstanding, error