1 a a noisy chattering European bird, Garrulus glandarius, with vivid pinkish-brown, blue, black, and white plumage. b any other bird of the subfamily Garrulinae.
2 a person who chatters impertinently.
Etymology: ME f. OF f. LL gaius, gaia, perh. f. L praenomen Gaius: cf. jackdaw, robin
Useful english dictionary. 2012.