What does "crease" mean?

Additional senses

1. 2.(Cricket) One of the lines serving to define the limits of the bowler and the striker. Bowling crease (Cricket), a line extending three feet four inches on each side of the central strings at right angles to the line between the wickets. -- Return crease (Cricket), a short line at each end of the bowling crease and at right angles to it, extending toward the bowler. -- Popping crease (Cricket),, a line drawn in front of the wicket, four feet distant from it, parallel to the bowling crease and at least as long as the latter. J. H. Walsh (Encyc. of Rural Sports).
2. 3.To make a crease or mark in, as by folding or doubling. Creased, like dog's ears in a folio. Gray.