on the level

Cultural  

1. Honest, without deception: “We doubted that the offer could be genuine, but it turned out to be on the level.”

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on the level Idioms  

1. Honest, straightforward, sincere, as in You can believe her—she's on the level. This expression may have come from Freemasonry, where the carpenter's level symbolizes integrity. [Late 1800s]

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