It consists of two dissimilar portions: How to use southeast in a sentence. Southeast asia, vast region of asia situated east of the indian subcontinent and south of china.
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Southeast asia[b] is the geographical southeastern region of asia, consisting of the regions that are situated south of china, east of the indian. Southeast asia is a geographically diverse region with equally diverse lifestyles and traditions throughout human history. The meaning of southeast is to, toward, or in the southeast.