The outer side of a window or door frame; the jamb.
"The carpenter measured the reveal to ensure the glass would fit perfectly within the window frame."
In plain English: A reveal is something that was hidden but has now been shown to everyone.
"The secret was finally revealed at the end of the movie, but that revelation shocked everyone in the theater."
Usage: As a noun, reveal refers specifically to the vertical sides of a window or door opening between the trim and the wall. Do not use this term for general disclosures or secrets, as that is reserved for its verb form meaning "to uncover."
make known to the public information that was previously known only to a few people or that was meant to be kept a secret
"The auction house would not disclose the price at which the van Gogh had sold"
"The actress won't reveal how old she is"
"bring out the truth"
"he broke the news to her"
"unwrap the evidence in the murder case"
"The newspaper uncovered the President's illegal dealings"
To uncover; to show and display that which was hidden.
"The magician used a clever trick to reveal the secret card from beneath his sleeve."
In plain English: To reveal means to show something that was hidden before so people can see it now.
"The magician revealed his assistant from behind the curtain with a dramatic flourish."
The word "reveal" comes from the Latin revēlāre, which originally meant to uncover something hidden by removing a covering like a cloth or sail. It entered English through Middle French and Old French as revealer before evolving into its current spelling in Middle English.