(nautical) Initialism of nautical mile. / (athletics) Abbreviation of no-mark.

(idiomatic) To achieve something amazing; to do something which brings great public acclaim.

(computing) A change in one part of a software system that potentially causes other components to fail; occurs most often in shared libraries of code used by multiple applications.

(entomology) any of the caddisflies in the family Limnephilidae, formerly known as the Limnophilidae