SOMETIME, adv. some and time.
1. Once formerly. That fair and warlike form, in which the majesty of buried Denmark did sometime march.
2. At one time or other hereafter. Sometime is really a compound noun, and at is understood before it at some time.
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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