A big wheel is a very large upright wheel with carriages around the edge of it which people can ride in. Big wheels are often found at theme parks or fun fairs.
[British]regional note: in AM, use ferris wheel
big wheel in British English
noun
1. another name for a Ferris wheel
2. informal
an important person
Examples of 'big wheel' in a sentence
big wheel
So I held Peggy's hand in mine as the big wheel kept turning and, everywhere she looked, the adult world towered above her.