EXPAN'SION, n. L. expansio. The act of expanding or spreading out.
1. The state of being expanded the enlargement of surface or bulk dilatation. We apply expansion to surface, as the expansion of a sheet or of a lake, and to bulk, as the expansion of fluids or metals by heat but not to a line or length without breadth.
2. Extent space to which any thing is enlarged also, pure space or distance between remote bodies.
3. Enlargement as the expansion of the heart or affections.
The King James Bible has stood its ground for nearly 400 years. However, during that time the English language has changed, and with it the meanings of some words it used. Here are more than 6,500 words whose definitions have changed since 1611.Wikipedia
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