Glésing

According to the Old English Dictionary:

glésincg, e;

glésing

f. A GLOSSING, interpretation, explanation; glossa :-- Ðæt is glésincg ðonne mann glésþ ða earfoðan word mid eáðran Lédene that is glossing when one explains the difficult words with easier Latin, Ælfc. Gr. 50; Som. 51, 43. glesing