The First American English Dictionary by Noah Webster
With more than 61k definitions, this version of Webster's 1828 dictionary can be used off line.
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In
IN, a prefix, Latin in is used in composition as a particle of negation, like the English un, of which it seems to be a dialectical orthography; or it denotes within, into, or among, as in inbred, incase; or it serves only to augment or render emphatical the sense of the word to which it is prefixed, as in inclose, increase.