Superscribe \Su`per*scribe"\, v. t. [imp. & p. p. {Superscribed}; p. pr. & vb. n. {Superscribing}.] [L. superscribere, superscriptum; super over + scribere to write. See {Super-}, and {Scribe}.] To write or engrave (a name, address, inscription, or the like) on the top or surface; to write a name, address, or the like, on the outside or cover of (anything); as, to superscribe a letter.