Definition of "warden"

He called to the wardens on the outside battlements. [The original (UK) editions read warders rather than wardens.

1820, Walter Scott, chapter IV, in Ivanhoe; a Romance. […], volumes (please specify |volume=I to III), Edinburgh: […] Archibald Constable and Co.; London: Hurst, Robinson, and Co. […]

The warden of the state prison, Ezekiel Purdy, was a kind man if stern. He invariably made all newcomers a little speech of welcome […]

1934, Nathanael West, “Chapter 7”, in A Cool Million‎

Faith I would have had him rosted like a warden in a brown Paper, and no more talk on’t:

c. 1607–1611, Francis Beaumont, John Fletcher, “Cupid’s Revenge”, in Comedies and Tragedies […], London: […] Humphrey Robinson, […], and for Humphrey Moseley […], published 1679, Act II, scene i

I must have saffron to colour the warden pies;

c. 1610–1611 (date written), William Shakespeare, “The Winters Tale”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act IV, scene iii]

In September, come Grapes; Apples; Poppies of all colours; Peaches; Melo-Cotones; Nectarines; Cornelians; Wardens; Quinces.

1625, Francis [Bacon], “Of Gardens”, in The Essayes […], 3rd edition, London: […] Iohn Haviland for Hanna Barret

Wardens, a name given to pears which never melt, are long keeping, and used for cooking only. The name comes from the Cistercian Abbey of Warden in Beds. Parkinson’s Warden is now Black Worcester. There are Spanish, White and Red Wardens.

1903, E. Bartrum, The Book of Pears and Plums‎, London: John Lane, page 30