Definition for IN-STRU-MENT'AL

IN-STRU-MENT'AL, a.

  1. Conducive as an instrument or means to some end; contributing aid; serving to promote or effect an object; helpful. The press has been instrumental in enlarging the bounds of knowledge.
  2. Pertaining to instruments; made by instruments; as instrumental music, distinguished from vocal music, which is made by the human voice.

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