(slang, fraternity) Initialism of newly initiated brother.

Of a product that is the subject of a consumer sale: new and still in its original packaging; not used.

(astronomy) A scenario for the dynamical evolution of the Solar System, proposing the migration of the giant planets from an initial compact configuration into their present positions, long after the dissipation of the initial protoplanetary gas disk.

Alternative form of nice-Nellyism

A prudish or excessively modest person.

(usually uncountable) Prudishness or excessive modesty. / (countable) A euphemism; an act or expression of prudishness or excessive modesty.

plural of nice Nelly

Alternative form of nice-Nelly

Prudish or excessively modest. / Characterized by euphemism; euphemistic.

(UK) Initialism of National Institute for Health and Care Excellence.