Definition of "gourmand"

I knew him, at Caivs trencher, when for hyre, / He proſtituted his abuſed body / To that great gourmond, fat Apicivs;

1603 (first performance; published 1605), Beniamin Ionson [i.e., Ben Jonson], “Seianus his Fall. A Tragœdie. […]”, in The Workes of Beniamin Ionson (First Folio), London: […] Will[iam] Stansby, published 1616, Act I, page 365

The colonel and his sponsor made a queer contrast: Greystone [the sponsor] long and stringy, with a face that seemed as if a cold wind was eternally playing on it. […] But there was not a more lascivious reprobate and gourmand in all London than this same Greystone.

1908, W[illiam] B[lair] M[orton] Ferguson, chapter I, in Zollenstein, New York, N.Y.: D. Appleton & Company, page 5

The third key was the number of demands from different patrons or groups for their own specialized cuisines. Such patrons included the court, rich households, and scholar-gourmands. Buddhists and Muslims also elaborated their own cuisines (sucai 素菜 and qingzhen 清真).

2000, Endymion Wilkinson, “Agriculture, Food, and the Environment”, in Chinese History: A New Manual‎, Rev. & enl. edition, Harvard University Press, page 636