someone who has red hair
"The bright sunlight made the redhead's golden curls glow vividly against her pale skin."
North American diving duck with a grey-and-black body and reddish-brown head
"The redhead duck glided silently across the lake, showcasing its distinctive grey-and-black body and striking reddish-brown head."
black-and-white North American woodpecker having a red head and neck
"The loud tapping of the redhead echoed through the forest as it searched for insects on the old oak tree."
A person with red hair.
"The redhead smiled brightly while wearing her bright yellow scarf."
A surname.
"Many residents in that town share the red-hat family name, which is often mistaken for a reference to hair color due to its similarity to the word redhead."
The word redhead is a Bahuvrihi compound formed from the words red and head to describe someone with reddish hair. This construction allows the phrase to function as an adjective referring to people rather than literally describing their heads themselves.