To specify: to mention specifically.
To become distinct or separate from what is common
To focus one's study upon a particular skill, field, topic, or genre.
To make distinct or separate due to form or function.
To narrow in scope.
To be known or notorious for some specialty.
To focus one's business upon a particular item or service.
Used other than figuratively or idiomatically: see work, in.
To find time or space for, amid other things.
To work out using a machine in between the sets of someone who is already using that machine.