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up-and-coming
up-and-down
up-and-under
up-bow
up-front
up quark
up-tempo
up-to-date
up-to-the-minute
Upanayana
Upanishad
upas
upbeat
upbraid
upbringing
upbuild
UPC
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updraft
up·draft [ úp dràft ] (plural up·drafts)


noun 
Definition:
 
air moving upward: a current of air that is moving upward
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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