The October twenty-third meeting about the vending machines has been rescheduled for October twenty-fourth due to Koichi’s birthday party.
Automatic (自動) sell sell machine. The machine sells things by itself, basically. This is a vending machine. There is a shorter version of this, but good to learn the long one first :)
This is a jukugo word, which means on'yomi readings from the kanji. Remember those, and you'll be fine here.