PM, Afternoon, P.M.
noun
What is noon after? That is PM or the afternoon.
ごご
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.
午後は、会社にいますか?
Are you at the company in the afternoon?
ジェニーは毎日、午後3:00にお茶をのみます。
Jenny has tea at 3:00 p.m. every day.
午後のクラスには行きますか?
Are you going to the afternoon class?