"quality, state, or condition of having existence," 1660s, from being + -ness.
Entries linking to beingness
being n.
c. 1300, "existence," in its most comprehensive sense, "condition, state, circumstances; presence, fact of existing," early 14c., existence," from be + -ing. The sense of "that which physically exists, a person or thing" (as in human being) is from late 14c.
-ness
word-forming element denoting action, quality, or state, attached to an adjective or past participle to form an abstract noun, from Old English -nes(s), from Proto-Germanic *in-assu- (cognates: Old Saxon -nissi, Middle Dutch -nisse, Dutch -nis, Old High German -nissa, German -nis, Gothic -inassus), from *-in-, originally belonging to the noun stem, + *-assu-, abstract noun suffix, probably from the same root as Latin -tudo (see -tude).