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Webster 1913 Edition

{

, }

Noun.

[L.

segnitas

, fr.

segnis

slow, sluggish.]

Sluggishness; dullness; inactivity.

[Obs.]

Noun.

[from L. segnis.] Sluggishness; dullness; inactivity. [Not used.]

segnity ‎(uncountable)

(obsolete) Sluggishness; dullness; inactivity.
- 1819, Ezekiel Sanford, Robert Walsh, The works of the British poets: with lives of the authors (volume 11, page 46)
  The ancient laws of the drama were founded upon the presumed segnity of the human mind; upon a supposition, that the fancy is a calculator of probabilities.