[countable] the part of the body on top of the neck containing the eyes, nose, mouth and brain. She nodded her head in agreement. He shook his head in ...

1[countable] the part of the body on top of the neck containing the eyes, nose, mouth, and brain She nodded her head in agreement. He shook his head in ...

+ adv./prep. to move in a particular direction. Where are we heading? Where are you two headed? Let's head back home. She headed for the door.

[transitive] head something (also head somethingup) to lead or be in charge of something She has been appointed to head the research team.

What does the noun head mean? There is one meaning in OED's entry for the noun head. See 'Meaning & use' for definition, usage, and quotation evidence.

a person who is very enthusiastic about a particular thing or is addicted to a particular drug; a gearhead (= a person who is very enthusiastic about cars)

​in which two people or groups face each other directly in order to decide the result of a competition or an argument. a head-to-head battle/clash/contest.

​in which people express strong views and deal with something in a direct way. There was a head-on confrontation between management and unions.

There are two meanings listed in OED's entry for the noun Head. See 'Meaning & use' for definitions, usage, and quotation evidence.

in which two people or groups face each other directly in order to decide the result of a disagreement or competition a head-to-head battle/clash/contest.