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Webster 1913 Edition

Adj.

[See 1st

Bearing no mast;

as, a

mastless

oak or beech

Dryden.

Adj.

[See 2d

Having no mast;

as, a

mastless

vessel

Adj.

Having no mast; as a vessel.

Bearing no mast; as a mastless oak or beech.

mastless ‎(not comparable)

Without a mast.
a mastless ship
Bearing no mast (fruit of a tree).

a mastless oak or beech

(Can we find and add a quotation of Dryden to this entry?)