A person who practices nudism.
"After years of visiting public beaches, she finally decided to become a full-time nudist."
In plain English: A nudist is someone who chooses to go around without wearing clothes, usually as part of a social group that accepts being naked.
"The nudist colony is located on a secluded beach where people gather to swim without clothes."
Relating to nudists and nudism.
"The resort's policies are strictly adhered to by anyone involved in activities relating to nudists and nudism."
In plain English: A nudist is someone who believes it is normal and acceptable to go without clothes, especially while relaxing at home or with friends they trust completely.
"The nudist beach was surprisingly crowded this weekend."
The word nudist combines the root of nude with the suffix -ist, which denotes a person who practices something. It was first used to describe someone who participates in nudity as a lifestyle choice rather than just being unclothed at that moment.