Something scintillating is flashing briefly and sharply with light. Scintillating conversations are smart and captivating.

To be scintillating is to be sharp. Things that are scintillating are exciting: they grab your attention with sparkles, flashes of light, or sheer brilliance. Most often, we talk about scintillating conversations and speakers. If you say someone is scintillating, then they are clever — people want to listen to them. This is a word often used sarcastically. If someone is boring, you might say "Well, that was scintillating," while rolling your eyes.

Definitions of scintillating

adj having brief brilliant points or flashes of light

“the scintillating stars”
aglitter, coruscant, fulgid, glinting, glistering, glittering, glittery, scintillant, sparkly
emitting or reflecting light readily or in large amounts

adj marked by high spirits or excitement

scintillating personality”
bubbling, effervescent, frothy, sparkly
full of life and energy

adj brilliantly clever

scintillating wit”
“a play full of scintillating dialogue”
having the capacity for thought and reason especially to a high degree

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