We are planning a family reunion in Australia in the near future.

in 是介词，表示"在...时间范围内"。 the 是定冠词，特指某个时间段。 near 是形容词，意思是"接近的、不远的"。 future 是名词，意思是"未来、将来"。 in the near future 是一个固定短语，表示"在不久的将来、近期内"。