Webster's Revised Unabridged Dictionary · 1913

Interested

Interested (in"tẽr*est*ed) , adjective

[See Interest, transitive verb]

1.
Having the attention engaged; having emotion or passion excited; as, an interested listener.
2.
Having an interest; concerned in a cause or in consequences; liable to be affected or prejudiced; as, an interested witness; an interested party.