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Iff vs Riff - What's the difference?

iff | riff |

As an abbreviation iff

is if and only if; used to show that the truth values of two statements are the same.

As an initialism IFF

is interchange File Format, a file format standard developed for Amiga computers.

As a noun riff is

a repeated instrumental melody line in a song.

As a verb riff is

to improvise in the performance or practice of an art, especially by expanding on or making novel use of traditional themes.

iff

English

Abbreviation

(Abbreviation) (head)
  • (mathematics, logic) if and only if; used to show that the truth values of two statements are the same.
  • See also

    * formal logic

    riff

    English

    Noun

    (en noun)
  • A repeated instrumental melody line in a song.
  • * {{quote-news
  • , year=2009 , date=November 27 , author= , title=Jimi Hendrix's Voodoo Child has 'best guitar riff' , work=BBC citation , page= , passage=Jimi Hendrix's Voodoo Child has been named the greatest guitar riff of all time, 41 years after it was recorded, in a poll by website Music Radar.}}
  • A clever or witty remark.
  • A variation on something.
  • *2012 , The Economist, London Skyline: Tower Power
  • Both the Orbit and the Pinnacle are riffs on an idea sketched out in 1917 by Vladimir Tatlin for a monument to international communism.
  • A spoof
  • * 26 June 2014 , A.A Dowd, AV Club Paul Rudd and Amy Poehler spoof rom-com clichés in They Came Together [http://www.avclub.com/review/paul-rudd-and-amy-poehler-spoof-rom-com-cliches-th-206220]
  • The creative team has experience with spoofing: Both Rudd and Poehler had parts in Wain’s Wet Hot American Summer, a hysterically irreverent riff on ’80s summer-camp comedies.

    Verb

    (en verb)
  • To improvise in the performance or practice of an art, especially by expanding on or making novel use of traditional themes.
  • See also

    * riff-raff * riffraff