Eclat is a noun that refers to a brilliant display or effect. 

Our word of the day comes almost directly from the French word for ‘burst out.’ Since the late 17th century, it’s been used as a noun to refer to anything that bursts out in a prominent or audacious way. Here’s an example of it in use:

Say what you will about George, but he sure has eclat. When he showed up for work in a sequined tuxedo, he caught everybody’s eye immediately.