Definition of dy:
(adv) :
(text messaging) already
(n) :
A surname from Khmer.
(n) :
(India, attributive) Abbreviation of deputy. [One appointed as the substitute of others, and empowered to act for them, in their name or their behalf; a substitute in office.]
(v) :
Obsolete form of die. [(intransitive) To stop living; to become dead; to undergo death.]