It means "aunt on the mother's side".
Prospect, it means: potential things that may come to pass, often favorable, or to search for something, like gold.
An example sentence using prospect as a noun is: The result, therefore, of this physical inquiry is, that we find no vestige of a beginning,— no prospect of an end.
An example sentence using prospect as a verb is: During the gold rush in California, many people prospected for gold by panning in the river.
<span>Expository writing is used to describe something, so yes it can be used for both!
Hope this helps! :)
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March 26, 1969 United States