Definition of robin

• n. - A small European singing bird (Erythacus rubecula), having a reddish breast; -- called also robin redbreast, robinet, and ruddock.
• n. - An American singing bird (Merula migratoria), having the breast chestnut, or dull red. The upper parts are olive-gray, the head and tail blackish. Called also robin redbreast, and migratory thrush.
• n. - Any one of several species of Australian warblers of the genera Petroica, Melanadrays, and allied genera; as, the scarlet-breasted robin (Petroica mullticolor).
• n. - Any one of several Asiatic birds; as, the Indian robins. See Indian robin, below.