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Webster 1913 Edition

Adj.

Spun out, or extended, to great length; hence, long-winded; tedious.

The

longspun

allegories fulsome grow,
While the dull moral lies too plain below.

Addison.

Adj.

Spun or extended to a great length.

longspun ‎(comparative more longspun, superlative most longspun)

Spun out, or extended, to great length; long-winded; tedious.
The longspun allegories fulsome grow, / While the dull moral lies too plain below. — Addison.