uncharted
adjectiveUK /ʌnˈtʃɑː.tɪd/
US /ʌnˈtʃɑːr.t̬ɪd/
Not drawn or mapped on any map, so nobody knows what is there.
The explorers sailed into uncharted waters where no map had ever been made.
RELATED WORDS
OTHER MEANINGS
2. Not yet studied or dealt with, so it is new and unfamiliar.
The scientists are working in an uncharted area of research.
3. Not written down or recorded in an official list.
The old ship sailed under an uncharted name.
4. Not shown or marked on a chart or diagram.
The tiny island was uncharted until a sailor spotted it.