As a verb, "apply" means:
* To put into practice or use.
* To make a formal request for something, such as a job or a loan.
* To put something on a surface, such as paint or lotion.
Example sentences:
* Applying for a job can be a stressful process. (formal request)
* The new technology is being applied to improve efficiency. (put into practice)
* She applied a layer of sunscreen before going to the beach. (put on a surface)
It's important to note that the noun "application" is a separate word with a different meaning.