Definition of marginal value in US English:

marginal value

noun

Economics
  • The value gained from either consuming or producing one additional unit of a good or service.

    ‘the marginal value to him of an extra acre would be less than its price’
    ‘you can add smart people to a team to get increased output, although at decreasing marginal values’
    • ‘Expectations for use of Internet resources must be justified by added marginal value to the instructional activity.’
    • ‘The marginal value of the second sock is a matching pair of socks.’
    • ‘The marginal value of membership clearly was less than the fee increase for about 400 former members.’
    • ‘He showed that the use of money was determined by marginal value, just as the use of any other good.’
    • ‘Older women place a very high marginal value on their health.’