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Webster 1913 Edition

Noun.

The condition of being pregnant; the state of being with young.

Figuratively: The quality of being heavy with important contents, issue, significance, etc.; unusual consequence or capacity; fertility.

Fuller.

Noun.

[See Pregnant.] The state of a female who has conceived, or is with child.

Fertility; fruitfulness; inventive power; as the pregnancy of wit or invention.

Pregnance, in a like sense, is not used.