1.VerbTo let go; to allow; to release; to pass over without action.
"; The police officer let the ticket slide when she found her brother-in-law's car illegally parked.; The administrator let the minor infraction slide with only a disapproving look."
2.VerbTo pass out of one's thought as not being of any consequence.
3.VerbTo tolerate a violation of a norm from.
"The judge let me slide on the speeding, but not on a $200 seat-belt violation."
4.VerbTo allow the condition of something to deteriorate due to negligence or apathy.
"He let the farm slide after inheriting it from his father."
5.VerbUsed other than figuratively or idiomatically: see let, slide.