Definition of longness in English:

longness

noun

  • The fact or quality of being long, especially in relation to physical size or the passage of time; the degree or extent to which something is long; linear magnitude, length; duration. Formerly also: †protractedness, delay (obsolete).

Origin

Old English. From long + -ness. Compare length and also longsomeness.

Pronunciation

longness

/ˈlɒŋnəs/