mo meaning and definition

MO noun

Definition of mo (noun)

1. an indefinitely short time
   • "wait just a moment"; "in a mo"; "it only takes a minute"; "in just a bit"
   • synonyms: bit, minute, moment, second
2. a polyvalent metallic element that resembles chromium and tungsten in its properties; used to strengthen and harden steel
   • synonyms: atomic number 42, molybdenum
3. a midwestern state in central United States; a border state during the American Civil War, Missouri was admitted to the Confederacy without actually seceding from the Union
   • synonyms: Missouri, Show Me State