1. Of the third formation.

2. An associate of a monkish fraternity under vew to observe the rules of the order but not leading a monastic life. Tertiary formation, a series of strata more recent than the chalk, and which has been divided into eocene, miocene and pliocene, which see.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• tertiory,
• terciary,
• terriory,
• tetiary,
• tretiary,
• tersiary,
• terrtiory,
• teriary,
• teritary,
• terriary,
• tertiaty,
• tiertiary,
• turtiary,
• tertiry,
• tertiery,
• petilary,
• terrteity,
• tertiall,
• tertiare,
• tertuero

• territory,
• tertry,
• territorial.

The adjective form of the word "tertiary" is "tertiary".

The plural of the "tertiary" can be the "tertiaries".

The singular of the "tertiary" can be the "tertiary".