Definition of in closing
: at the end of a speech, letter, etc. “Thank you all for your help, and for making the fair such a big success,” she said in closing. —used to introduce the final remarks in a speech, letter, etc. In closing, I would like to make one final point.
Seen and Heard
What made you want to look up in closing? Please tell us where you read or heard it (including the quote, if possible).