NF noun 6adjective 1 noun6 •(US) Prefix code for NASA research fighter plane designations. •Initialism of neurofibromatosis. •Initialism of necrotizing fasciitis. •Initialism of normal form. •Initialism of normalization form. •Initialism of national federation. adjective1 •(slang) Initialism of not frat, denoting things counter to the culture of Greek life, particularly in the Southern United States.
