Definition of ending:
the end of a word (a suffix or inflectional ending or final morpheme); "I don't like words that have -ism as an ending"
the act of ending something; "the termination of the agreement"
the point in time at which something ends; "the end of the year"; "the ending of warranty period"
event whose occurrence ends something; "his death marked the ending of an era"; "when these final episodes are broadcast it will be the finish of the show"
the last section of a communication; "in conclusion I want to say..."