What Part of Speech is “AT”

In the English language, the word “at” has only a single function. This common word is used as a preposition.

  1. Preposition

This word can be classified as a preposition because it can be used to indicate position in time or place. For instance, in the sample sentence below:

My kids go to bed at nine o’clock. 

The word “at” is considered as a preposition because it is used to specify the time “nine o’clock.”


a. expressing location or arrival in a particular place or position

  • Example:
  • They live at Winterfell.

b. expressing the time when an event takes place

  • Example:
  • The desert is cooler at night.

c. denoting a particular point or segment on a scale

  • Example:
  • The prices start at $100.