IFR
(initialism) . (aviation, pilot training) '''Instrument Flight Rules''', a set of rules for a pilot flying on instruments in contrast to '''Visual Flight Rules''' ("VFR").This is an unmodified, but possibly outdated, definition from Wiktionary and used here under the Creative Commons license. Wiktionary is a great resource. If you like it too, please donate to Wikimedia.
This entry was last updated on RefTopia from its source on 3/20/2012.