Definition of "sometime"

sometime

/ˈsʌmˌtaɪm/

adverb
not comparable
1. At an indefinite but stated time in the past or future.
2. (obsolete) Sometimes.
3. (obsolete) At an unstated past or future time; once; formerly.
  Quotations
  Did they not sometime cry "All hail" to me?
  1595 December 9 (first known performance), William Shakespeare, “The life and death of King Richard the Second”, in Mr. William Shakespeares Comedies, Histories, & Tragedies: Published According to the True Originall Copies (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act IV, scene i]
adjective
not comparable
1. Former, erstwhile; at some previous time.
  Quotations
  Therefore our sometime sister, now our queen / Th' imperial jointress to this warlike state
  c. 1599–1602 (date written), William Shakespeare, “The Tragedie of Hamlet, Prince of Denmarke”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act I, scene ii]
  Ion our sometime darling, whom we prized / As a stray gift, by bounteous Heaven dismiss'd
  1832, Thomas Noon Talfourd, Ion: A Tragedy, in Five Acts
2. Occasional.