Definition of "overstrike"

overstrike

/ˈəʊvəstɹʌɪk/

verb
third-person singular simple present overstrikes, present participle overstriking, simple past overstruck, past participle overstruck or (rare) overstricken
1. (obsolete, reflexive) To overreach oneself while striking.
  Quotations
  For as he in his rage him overstrooke, / He, ere he could his weapon backe repaire, / His side all bare and naked overtooke, / And with his mortal steel quite through the body strooke.
  1596, Edmund Spenser, “Book V, Canto XI”, in The Faerie Queene. […], London: […] [John Wolfe] for William Ponsonbie
2. (transitive) To cover up (a design, mark etc.) by stamping another on top of it; to superimpose a mark or logo on (a coin, stamp, etc.).
3. (transitive) To strike (something) too hard.
noun
countable and uncountable, plural overstrikes
1. (numismatics) A coin that has been overstruck, i.e. coined more than once.
2. (typography) The printing of one character over another, as - on top of L to produce Ł.
3. (computing, uncountable) overtype (feature where input replaces existing characters instead of being inserted before them)