Definition of "jay"

Any of the numerous species of birds belonging to several genera within the family Corvidae, including Garrulus, Cyanocitta, Aphelocoma, Perisoreus, Cyanocorax, Gymnorhinus, Cyanolyca, Ptilostomus, and Calocitta, allied to the crows, but smaller, more graceful in form, often handsomely coloured, usually having a crest, and often noisy.  examples

Any of various other birds of similar appearance and behaviour.

1. The Indian roller, Coracias benghalensis.  quotations  examples

   Quotations

   • They are the commonality of birddom, who furnish forth the mobs which bewilder the drunken-flighted jay when he jerks, shrieking in a series of blue hyphen-flashes through the air […]

     1878, Philip Stewart Robinson, In My Indian Garden

Any of various large papilionid butterflies of the genus Graphium.  examples

(archaic) A dull or ignorant person. It survives today in the term jaywalking.  quotations

(obsolete) Promiscuous woman; prostitute.  quotations

The name of the Latin-script letter J.  examples

(slang) A marijuana cigarette; a joint.  quotations