The phrase “tertiary” is an adjective meaning “of third significance or rank”. It’s typically used to explain one thing that’s much less necessary than two different issues. For instance, you may say that your “tertiary” objective is to discover ways to play the guitar. Which means studying the guitar is much less necessary to you than two different objectives, corresponding to ending faculty and getting a job.
The phrase “tertiary” will also be used to explain one thing that’s third in a sequence. For instance, you may say that the “tertiary” stage of a challenge is the testing section. Which means the testing section is the third stage of the challenge, after the planning and improvement levels.
