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.