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.