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Webster 1913 Edition

(ăb-sĕnt′ment)

Noun.

The state of being absent; withdrawal.

[R.]

Barrow.

Noun.

A state of being absent.

absentment ‎(uncountable)

(rare, obsolete): The state of being absent; withdrawal
(Can we find and add a quotation of Isaac Barrow to this entry?)