interjection
Definition: A word used to alert people to be careful because something is coming down from above.
Example: When the tree branch broke, someone shouted, 'Heads!' to warn everyone below.
noun
Definition: The plural form of the word 'head', which can refer to the upper part of the body, a leader, or various other meanings depending on the context.
Example: The heads of the department met to discuss the new policy.
verb
Definition: To lead or be in charge of something; to go in a particular direction.
Example: She heads the marketing department at her company.