Definition of "humor"

For some days a fistula lacrymalis had come into my left eye, which discharged an humour, when pressed, that portended danger.

1763, Antoine-Simon Le Page du Pratz, History of Louisiana, PG, page 40

The humor of my proposition appealed more strongly to Miss Trevor than I had looked for, and from that time forward she became her old self again; for, even after she had conquered her love for the Celebrity, the mortification of having been jilted by him remained.

1897 December (indicated as 1898), Winston Churchill, chapter VIII, in The Celebrity: An Episode, New York, N.Y.: The Macmillan Company; London: Macmillan & Co., Ltd.

There are two ways to become an authority on humor. The first way is to be one of the perpetrators. You know them: comedians, satirists, cartoonists, and impersonators. The second way to gain such credentials is to be the victim of their merciless talents. As such a victim, I take a backseat to no one as far as humor is concerned.

1987, Gerald Ford, “What's So Funny About the Presidency?”, in Humor and the Presidency‎, New York: Arbor House, page 15