D defs.my
Entry 4 senses · 2 variants Webster, 1913

Supplement

/sŭp'-ləm-ənt/ · Sup·ple·ment · IPA /ˈsʌp.lə.mənt/
01 n. That which supplies a deficiency, or meets a want; a store; a supply.
  1. 1.
    That which supplies a deficiency, or meets a want; a store; a supply.[Obs.]
  2. 2.
    That which fills up, completes, or makes an addition to, something already organized, arranged, or set apart; specifically, a part added to, or issued as a continuation of, a book or paper, to make good its deficiencies or correct its errors.
  3. 3.
    The number of degrees which, if added to a specified arc, make it 180°; the quantity by which an arc or an angle falls short of 180 degrees, or an arc falls short of a semicircle.(Trig.)
Syn. Appendix.
Appendix, Supplement. An appendix is that which is appended to something, but is not essential to its completeness; a supplement is that which supplements, or serves to complete or make perfect, that to which it is added.
02 v. t. To fill up or supply by addition; to add something to.
imp. & p. p. Supplemented; p. pr. & vb. n. Supplementing
  1. 1.
    To fill up or supply by addition; to add something to.
    “Causes of one kind must be supplemented by bringing to bear upon them a causation of another kind.” I. Taylor.