As an adjective, denotes the condition of being constrained by the obligations of a bond or a covenant.
On RootsWeb there is a transcript of a talk “What Genealogists should know about 18th Century Virginia Law” presented November 17, 1999 at the Library of Virginia by Mr. John P. Alcock, President, Friends of the Virginia State Archives. This gives an overview of several laws of the period, including nuances that will not be familiar to a modern audience. For instance, the word “orphan” did not have its current meaning of a child who has lost both parents. In a discussion of children who were taken away from their mothers and bound to serve strangers, Mr. Alcock says:
A child whose father had died was an orphan in that era, even if her mother was living. The father in his will could name a guardian or guardians for his infant children (infant was the legal term for under age) to manage their estates and arrange for their education. If he did not do so or if he died intestate, the court could name the guardian unless the child was 14 or older, in which case he or she could choose one. However, “where the estate of the orphan be so small value that no person will educate and maintain him for the profits thereof, such orphan shall be bound apprentice, every male to some tradesman, merchant, mariner, or other person approved by the court until the age of 21.”. Females were similarly bound but to age 18. The master or mistress of every servant was to provide “diet, clothes, lodgings and accommodations and teach him to read and write and at the expiration of his apprenticeship to give him the same allowance appointed for servants of indenture”.