appurtenance

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. Something added to another, more important thing; an appendage. See Synonyms at appendage.
2. n. Equipment, such as clothing, tools, or instruments, used for a specific purpose or task; gear.
3. n. Law A right, privilege, or property that is considered incident to the principal property for purposes such as passage of title, conveyance, or inheritance.

Century Dictionary and Cyclopedia

1. n. The act, state, or fact of appertaining.
2. n. That which appertains or belongs to something else; something belonging to another thing as principal; an adjunct; an appendage; an accessory: as, “appurtenances of majesty,”
3. n. Specifically, in law, a right, privilege, or improvement belonging to a principal property, as a right of pasture in a common attached to an estate, outhouses, gardens, etc., attached to a mansion, and the like.
4. To furnish with by way of appurtenance; supply or equip.

Wiktionary

1. n. An appendage added to something else.
2. n. in the plural Equipment used for some specific task; gear.
3. n. The thing to which another pertains.
4. n. law Minor property (such as an outhouse) that passes with the main property when it is sold.
5. n. grammar A modifier that is appended or prepended to another word to coin a new word that expresses belonging.

GNU Webster's 1913

1. n. That which belongs to something else; an adjunct; an appendage; an accessory; something annexed to another thing more worthy; in common parlance and legal acceptation, something belonging to another thing as principal, and which passes as incident to it, as a right of way, or other easement to land; a right of common to pasture, an outhouse, barn, garden, or orchard, to a house or messuage. In a strict legal sense, land can never pass as an appurtenance to land.

WordNet 3.0

1. n. equipment consisting of miscellaneous articles needed for a particular operation or sport etc.
2. n. a supplementary component that improves capability