Definition of "margent"

Nothing but this! Yes, as much love in rimeAs would be cramm'd up in a sheet of paperWrit o' both sides the leaf, margent and all,That he was fain to seal on Cupid's name.

c. 1595–1596 (date written), William Shakespeare, “Loues Labour’s Lost”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act V, scene ii]

Examine every married lineament,And see how one another lends contentAnd what obscured in this fair volume liesFind written in the margent of his eyes.

c. 1591–1595 (date written), William Shakespeare, “The Tragedie of Romeo and Ivliet”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act I, scene iii]

Sweet Echo, sweetest nymph, that liv'st unseenWithin thy airy shellBy slow Meander's margent green

1634 October 9 (first performance), [John Milton], edited by H[enry] Lawes, A Maske Presented at Ludlow Castle, 1634: […], London: […] [Augustine Matthews] for Hvmphrey Robinson, […], published 1637; reprinted as Comus: […] (Dodd, Mead & Company’s Facsimile Reprints of Rare Books; Literature Series; no. I), New York, N.Y.: Dodd, Mead & Company, 1903,

All the ancient Inscriptions are entertoilees with Snakes, e. g. as in the margent.

1687, John Aubrey, Remaines of Gentilisme and Judaisme, page 38