1. At some indefinite or unstated time
   "It was to be printed sometime later"; "let's get together sometime"; "everything has to end sometime"
    
2. [archaic] At a previous time
   "I met him sometime last year";
   - once, formerly, at one time, erstwhile [archaic], erst [archaic]

1. Belonging to some prior time
   "He was a sometime friend of my father's";
   - erstwhile, former, old, onetime, one-time, quondam

See also: past

Encyclopedia: Sometime, Somewhere