Here are some ways you can understand it:
* Making up something: The ingredients constitute a cake.
* Creating a new entity: The founding fathers constituted the United States of America.
* Defining something: The rules constitute the game.
* Having a particular quality: Her passion constitutes her strength.
Here are some examples of how "constituting" is used in sentences:
* "The students constitute a majority of the voters in this election." (They make up the majority.)
* "The constitution constitutes the fundamental law of the country." (It defines the basic laws.)
* "Her kindness constitutes her greatest virtue." (It's a defining characteristic of her.)
* "The board of directors constitutes the governing body of the company." (They form the governing group.)
Hopefully, these examples give you a better understanding of the meaning of "constituting"!