scintillating Get Printable Handwriting (scin-til-lat-ing) 4 syllables Learn It! Spelling Test Definition verb. 1 to flash or sparkle; 2 to be lively and witty. Example Sentence He could be counted on for scintillating conversation. Synonyms twinkle; flash; glimmer; glitter; shine; sparkle Antonyms dull Share with your friends: