What is the meaning of equivalent?

noun

• A person or thing equal to another in value or measure or force or effect or significance etc.
  • usage: "send two dollars or the equivalent in stamps"
• The atomic weight of an element that has the same combining capacity as a given weight of another element; the standard is 8 for oxygen.
  • synonyms: equivalent weight, combining weight, eq

adjective

• Being essentially equal to something.
  • usage: "it was as good as gold"; "a wish that was equivalent to a command"; "his statement was tantamount to an admission of guilt"
  • synonyms: tantamount