No
definition is needed here. But, since you obviously have been on a brain-using-free
day, I will explain.
See ya is something you say when parting ways, and intending to see them again.
Synonyms for see ya: goodbye, duuuuuh, bye, so long, peace out,
later, until next time, and they all lived happily ever after.
Antonyms: hello, hi, sup,
hey, do you wanna build a snow
dude?, how is life, been a while, once apon a time.