Exposition
Exhibition, Fair
noun
An exhibition that you look at and all the people come meet together. Well, that just sounds like the description of an exposition.
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.
この博覧会は無料で入場できます。
You can enter this exhibition free of charge.