an expression thanking a person; thank you
spoken or written appreciation
Cases of word usage
1) (of greetings, thanks etc) expressed with (too) much feeling (effusive)
2) feeling or showing thanks (grateful)
3) used to make one's statement, agreement etc stronger; used to make a statement of thanks stronger; used as a comment to show interest, surprise etc (indeed)
4) (an expression of) admiration or approval; honour and thanks (to God) (praise)