conjunction
Definition: A word used to connect two clauses, indicating that something happens at the same time as something else or during a certain period.
Example: While I was studying, my brother was playing video games.
noun
Definition: A period of time, often a short one, during which something happens or is done.
Example: I will wait here for a while before leaving.
transitive verb
Definition: To pass time in a relaxed or enjoyable way, often without doing anything productive.
Example: They decided to while away the afternoon by the lake.