Stash/stæʃ/ Definition 1 of 3Pro Tip 1/3Quick Action Used to describe a rapid motion to hide something, often to avoid detection. As soon as she entered, he stashed the gift behind a pillow. Pro Tip 2/3Stealth Required Implies secrecy and discretion when hiding the object. He silently stashed the note under the mat. Pro Tip 3/3Secrecy Context Often used in contexts where something is being hidden for a secretive or suspicious reason. She stashed the evidence before the police arrived.