Definition of "unfix"

unfix

verb
third-person singular simple present unfixes, present participle unfixing, simple past and past participle unfixed
1. (transitive) To unfasten from a fixing.
  Quotations
  Whose horrid image doth unfix my hair and make my seated heart knock at my ribs against the use of nature?
  c. 1606 (date written), William Shakespeare, “The Tragedie of Macbeth”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act I, scene iii]