What are the women going to do tomorrow afternoon?
What's the closest time in the afternoon that's available for an appointment?
I have an appointment with my doctor at 3PM to remove an ingrown toenail.
What is noon after? That is PM or the afternoon.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.