QT Definition
kyo͝otē
noun
The state of being secret or confidential.
Told me the story strictly on the QT.
American Heritage
Wiktionary
(slang) Abbreviation for quiet. Also Q.T. or q.t. Used in the expression on the Q.T., meaning "secretly" or "in confidence."
Wiktionary
Quality time.
Wiktionary
abbreviation
Quantity.
Webster's New World
Quart(s)
Webster's New World
Origin of QT
q(uie)t
From American Heritage Dictionary of the English Language, 5th Edition