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Webster 1913 Edition

Adj.

adv.

Sticking out, or puffed out; swelling; in a swelling manner.

[Archaic]

Inflated and

astrut

with self-conceit.

Cowper.

In a strutting manner; with a strutting gait.

adv.

[See Strut.] In a strutting manner.

astrut ‎(not comparable)

(archaic) Sticking out, or puffed out; swelling.
Inflated and astrut with self-conceit. — Cowper.
(archaic) In a strutting manner; with a strutting gait.