companion

Definitions

• A friend, acquaintance, or partner; someone with whom one spends time or keeps company
• (dated) A person employed to accompany or travel with another.
• (nautical) The framework on the quarterdeck of a sailing ship through which daylight entered the cabins below.
• (nautical) The covering of a hatchway on an upper deck which leads to the companionway; the stairs themselves.
• (topology) A knot in whose neighborhood another, specified knot meets every meridian disk.
• (figuratively) A thing or phenomenon that is closely associated with another thing, phenomenon, or person.
• (attributive) An appended source of media or information, designed to be used in conjunction with and to enhance the main material.
• (astronomy) A celestial object that is associated with another.
• A knight of the lowest rank in certain orders.
• (obsolete) A fellow; a rogue.