Meaning

• A friend, acquaintance, or partner; someone with whom one spends time or keeps company

  "His dog has been his trusted companion for the last five years."

• A person employed to accompany or travel with another.

• The framework on the quarterdeck of a sailing ship through which daylight entered the cabins below.

• The covering of a hatchway on an upper deck which leads to the companionway; the stairs themselves.

• A knot in whose neighborhood another, specified knot meets every meridian disk.

• A thing or phenomenon that is closely associated with another thing, phenomenon, or person.

• An appended source of media or information, designed to be used in conjunction with and to enhance the main material.

  "The companion guide gives an in-depth analysis of this particular translation."

• A celestial object that is associated with another.

• A knight of the lowest rank in certain orders.

  "a companion of the Bath"

• A fellow; a rogue.

Meaning

• To be a companion to; to attend on; to accompany.

• To qualify as a companion; to make equal.