ifr

Fetched 2026-10-26 (cache).

Datamuse reports no synonyms or antonyms for this word.

Proper noun

1. {{lb|en|nuclear physics|engineering}} {{init of|en|w:Integral Fast Reactor}}.

Noun

1. {{senseid|en|Q847919}} {{lb|en|aviation|pilot training}} {{initialism of|en|w:instrument flight rules}}, a set of rules for a pilot flying on [[instrument]]s, primarily as a means of navigating through inclement weather.
2. {{lb|en|aviation|humorous}} ''Initialism of'' '''I follow roads''', to navigate simply via prominent ground features; this may be at very low level when flight would only normally be possible under [[w|Instrument Flight Rules]].
3. {{senseid|en|Q101404269}} {{lb|en|epidemiology}} {{initialism of|en|w:infection fatality rate}}.

Source: Wiktionary · CC BY-SA 4.0 (Wiktionary dump) · cached copy, not a rewrite.