supplement - definition and synonyms

 
 
noun [countable] 

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/ˈsʌplɪmənt/
singularsupplement
pluralsupplements
  1. 1
    something extra that you add to make something better
    supplement to:

    exercises that will provide a valuable supplement to your teaching materials

    1. a.
      a pill or special food that you take or eat when your food does not contain everything that you need
      a dietary/food/nutritional supplement:

      Dietary supplements may not help with this condition.

  2. 3
    an extra amount of money that you have to pay for special services, especially in a hotel