The name of the Latin-script letter K .
"The teacher asked everyone to write their names starting with the letter kay."
In plain English: A kayak is a small, narrow boat that you sit inside and steer with a double-bladed paddle.
"She paddled her kayak across the calm lake on a sunny Sunday morning."
Abbreviation of okay.
"She texted back 'kay' to confirm she would be there on time."
A surname, from Middle English derived from several Old and Middle English words; also adopted by immigrants whose surnames began with a K.
"Kay is a common American surname that originated as an Anglicized form of German names beginning with 'K' or other Old English roots."