1. Verb (phrasal verb): This is the most common usage. It means to leave the ground (for a plane) or to begin to be successful.
* Example: "The plane took off at 10:00 AM."
* Example: "Her career took off after she landed a starring role in a Broadway show."
2. Noun: It can refer to the act of leaving the ground.
* Example: "The take off was delayed due to bad weather."
* Example: "The astronauts prepared for their take off."
3. Adjective: It can describe something that is removed or detached.
* Example: "The take off valve was malfunctioning."
* Example: "The take off price for the tickets was very reasonable."
Therefore, the part of speech of "take off" depends on the context.