01 a. Destitute of feathers; naked; unfledged.
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1.
Destitute of feathers; naked; unfledged.“An in the leafy summit, spied a nest, Which, o'er the callow young, a sparrow pressed.” — Dryden.
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2.
Immature; boyish; “green”; as, a callow youth.“I perceive by this, thou art but a callow maid.” — Old Play [1675].