Here are some examples:
* "She espouses the principles of environmentalism." This means she publicly supports and promotes these principles.
* "The politician espoused a new economic policy." He publicly advocated for and took ownership of this policy.
* "The group espouses pacifism." They strongly believe in and advocate for pacifism.
Other meanings of "espouse":
* To marry: This is an older and less common usage.
* To give oneself as a spouse to: This is also an older and less common usage.
It's important to note that "espouse" is a formal word and is not often used in everyday conversation.