Webster’s Revised Unabridged Dictionary · 1913
Interested
In′ter·est·ed (ĭn′tẽr·ĕst·ĕd), a. [See Interest, v. t.]
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.