1. to cut off and throw away
2. to abandon; to disregard; to discard; to throw to the wolves
それを若さだと切り捨てられたくはない。I do not want to have it dismissed as youth.
3. to discard (numbers after a certain decimal place); to drop; to omit; to ignore; to round down
一円未満は切り捨ててください。Please round down any fraction of a yen.
4. to cut (someone) down; to slay