the GNU version of the Collaborative International Dictionary of English
n. Service of the shield, a species of knight service by which a tenant was bound to follow his lord to war, at his own charge. It was afterward exchanged for a pecuniary satisfaction. Called also scutage.
The Century Dictionary and Cyclopedia
n. In later feudal law, a commutation paid by feudal tenants in lieu of military service; scutage.
Word Usage
"Other taxes were raised from escuage, fees for knights service, and by other means arising out of the feudal system."