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Webster 1913 Edition

Noun.

Delineation; sketch; design; ideal; invention.

[Obs.]

For though that some mean artist’s skill were shown
In mingling colors, or in placing light,
Yet still the fair

designment

was his own.

Dryden.

Design; purpose; scheme.

[Obs.]

Shak.

, n.

Design; sketch; delineation.

Design; purpose; aim; intent; scheme.

designment ‎(plural designments)

(obsolete) One's design or plan; an objective, an undertaking.
- 1590, Edmund Spenser, The Faerie Queene, II.xi:
  The second Bulwarke was the Hearing sence, / Gainst which the second troupe dessignment makes [...].