If you say that someone is individualistic, you mean that they like to think and do things in their own way, rather than imitating other people. You can also say that a society is individualistic if it encourages people to behave in this way.
例句
Most artists are very individualistic...大多数艺术家都非常强调个人独特性。Spain remains a very individualistic country.西班牙一直都是个非常强调个人主义的国家。