fi

fi · noun

imported

Definitions

noun

  1. 1.

    (music) The seventh note of the musical scale in solmization; equivalent to "ti" or "si" in some systems.

  2. 2.

    An alternative representation of the Greek letter phi, used in mathematics and science.

  3. 3.

    (informal) Short for "Wi-Fi," a wireless networking technology.

Related words

See also: phi, scale, wifi

Etymology

From Medieval Latin, representing the seventh note of the musical scale. In mathematics, from Greek phi (Φ, φ), the 21st letter of the Greek alphabet.