It's more like 'bye' but why not you may use it. I agree with Sybil, it's rahter used while speaking to well-known people, e.g. family, good friends, unless, a person who uses it is a child (a toddler). Almost always, children use it, while adult people would say good-bye, see you soon, bye, etc.Aliocha said:I often have heard 'Pa!' : is it possible to use it for saying 'see you later' too?