Easton's Bible Dictionary
An overseer. In apostolic times, it is quite manifest that there was no difference as to order between bishops and elders or presbyters (Acts 20:17-28; 1 Peter 5:1, 2; Philippians 1:1; 1 Timothy 3). The term bishop is never once used to denote a different office from that of elder or presbyter. These different names are simply titles of the same office, "bishop" designating the function, namely, that of oversight, and "presbyter" the dignity appertaining to the office. Christ is figuratively called "the bishop [episcopos] of souls" (1 Peter 2:25).
Noah Webster's New International Dictionary of the English Language
1. (n.) A spiritual overseer, superintendent, or director.
2. (n.) In the Roman Catholic, Greek, and Anglican or Protestant Episcopal churches, one ordained to the highest order of the ministry, superior to the priesthood, and generally claiming to be a successor of the Apostles. The bishop is usually the spiritual head or ruler of a diocese, bishopric, or see.
3. (n.) In the Methodist Episcopal and some other churches, one of the highest church officers or superintendents.
4. (n.) A piece used in the game of chess, bearing a representation of a bishop's miter; -- formerly called archer.
5. (n.) A beverage, being a mixture of wine, oranges or lemons, and sugar.
6. (n.) An old name for a woman's bustle.
7. (v. t.) To admit into the church by confirmation; to confirm; hence, to receive formally to favor.
8. (v. t.) To make seem younger, by operating on the teeth; as, to bishop an old horse or his teeth.