/ ˈʃɔːtn; NAmE ˈʃɔːrtn/ verb
shorten (sth to sth) to make sth shorter; to become shorter :
[ vn ]
Injury problems could shorten his career.
a shortened version of the game
Her name's Katherine, generally shortened to Kay.
[ v ]
In November the temperatures drop and the days shorten.
OPP lengthen