|n.||1.||The quality of being capable; capacity; capableness; esp. intellectual power or ability.|
|2.||Capacity of being used or improved.|
|Noun||1.||capability - the quality of being capable -- physically or intellectually or legally; "he worked to the limits of his capability"|
|2.||capability - the susceptibility of something to a particular treatment; "the capability of a metal to be fused"|
|3.||capability - an aptitude that may be developed|
|(operating system, security)||capability - An operating system security or
access control model where specific types of access to a
specific object are granted by giving a process this data
structure or token.|
The token may be unforgeable (typically by using encryption or hardware "tagged" memory). Capabilities are used in OSes such as Hydra, KeyKOS, EROS, Chorus/Mix, and the Stanford V system. Similar to Kerberos, but in an OS context.
Compare access control list.