637

Used since the 1990s. From the number of letters in each word of the phrase.^[1]

637

1. (text messaging, chiefly pager slang) always and forever

   143 637 ― I love you always and forever

   AZN pride 637

From the hull number of the first boat of the class, USS Sturgeon (SSN-637), Sturgeon-class nuclear-powered attack submarine

637

1. (US, nautical, military) The Sturgeon class of attack submarine.

   Alternative forms: 637-class, 637 class

   Synonyms: Sturgeon class, Sturgeon

   Hypernyms: class, ship class, boat class, sub class

   Coordinate term: sturgeon

637 (plural 637s)

1. (US, nautical, military) A submarine of the Sturgeon class

   Alternative forms: 637-boat, 637 boat, 637-sub, 637 sub

   Synonyms: Sturgeon boat, Sturgeon sub

   Hypernyms: boat, sub, submarine

   Coordinate term: sturgeon