Average
Mean
noun, verbal noun
Something that's flat and equal to everything around it, all those flat things around it, are average. They're the mean (same as average).
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.
そのレストランの食事の平均価格は1500円です。
The average price of a meal at that restaurant is 1,500 yen.
2014年のセンター試験の平均点が出ました。
The average grade for 2014's National Center Test for University Admissions was revealed.
そのカフェ、コーヒーは平均的だったけど、店員さんがすごくフレンドリーだったよ。
The cafe's coffee was average, but the staff was really friendly.
日本の平均身長は、男性が約170cm、女性が約157cmです。
The average height in Japan is about 170 cm for men and 157 cm for women.