matin

In a sentence

• Je me réveille tôt chaque matin pour aller courir.

  I wake up early every morning to go running.

  Here, "matin" is used as a noun denoting the time of day, specifically the morning. It is singular and is modified by "chaque" to indicate occurrence every morning.

• Le matin est une période idéale pour lire tranquillement.

  The morning is an ideal period for reading peacefully.

  In this sentence, "matin" is used as a singular noun introduced by the definite article "le" to refer to the morning as a specific part of the day.

• Ce matin, il faisait très froid dehors.

  This morning, it was very cold outside.

  Here, "matin" is integrated into the phrase "ce matin" (this morning), referring specifically to the morning of the current day. "Ce" is a demonstrative adjective.