Meaning of "ya" is used in Chilean Spanish with different contexts such as:
Ya: Sí (Yes)
Quieres ese helado? (Would you like that ice cream?)
Ya! (Yes!)
Ya: Ahora (Now/ Straightaway)
Para ya! (Stop now!)
Ya: De acuerdo (To agree /OK)
Nos vemos mañana (See you tomorrow)
Ya! (I agree) /OK
Ya: Already (adverb).
Ya había dejado de fumar el año pasado (I had already stopped smoking last year)
Ya: Yet
Ya llegamos? (Are we there yet?)