companion > define

noun

• A friend who is frequently in the company of another.
  • usage: "drinking companions"; "comrades in arms"
  • synonyms: comrade, fellow, familiar, associate
• A traveler who accompanies you.
  • synonyms: fellow traveler, fellow traveller
• One paid to accompany or assist or live with another.

verb

• Be a companion to somebody.
  • synonyms: company, accompany, keep company

• (n.) One who accompanies or is in company with another for a longer or shorter period, either from choice or casually; one who is much in the company of or is associated with, another or others; an associate; a comrade; a consort; a partner.
• (n.) A wooden hood or penthouse covering the companion way; a companion hatch.
• (v.t.) To be a companion to; to attend on; to accompany.
• (n.) A knight of the lowest rank in certain orders; as, a companion of the Bath.
• (n.) A fellow; -- in contempt.
• (v.t.) To qualify as a companion; to make equal.
• (n.) A skylight on an upper deck with frames and sashes of various shapes, to admit light to a cabin or lower deck.

Companion is a bond engineered to support or uphold Planned Amortization Class (PAC) and Targeted Amortization Class securities. Also, referred to as a Support Bond.