As a Noun: 1. The friendly feelings you have towards someone and the wish to thank them because they have given you something or done something for you. English = appreciation, gratefulness, thanks. As a Verb or Adjective: 1. To have friendly feelings towards someone and to wish to thank them because they have given you something or done something for you. English = (be) grateful, (be) appreciative, (be) thankful; appreciate, give thanks, show your appreciation.