To move silently and furtively
To bring in or take out secretly
One who behaves in a stealthy, furtive way
Why did they have to sneak around?
I tried to sneak one in on my own.
He's tried for years to sneak someone inside our walls.
To her relief, she still had a few hours to sneak out and make it to the airport.
Martha added, "No one saw me sneak in."