Definition of robin
1 a
: a small chiefly European thrush (Erithacus rubecula) resembling a warbler and having a brownish-olive back and orangish face and breast
b
: any of various Old World songbirds that are related to or resemble the European robin
2
: a large North American thrush (Turdus migratorius) with olivaceous to slate-gray upperparts, blackish head and tail, black and whitish streaked throat, and dull reddish breast and underparts
