What is the meaning of Shorten?

To make shorter; to abbreviate.

To become shorter.

To make deficient (as to); to deprive (of).

To make short or friable, as pastry, with butter, lard, etc.

To reduce or diminish in amount, quantity, or extent; to lessen.

To make crumbly.

To take in the slack of (a rope).

To reduce (sail) by taking it in.

Source: wiktionary.org