A humanist is a person who believes in the value [the worth or importance of something] and importance of human beings and emphasizes [gives special attention and importance to] the well-being [the state of being happy, healthy and prosperous] and happiness of individuals and society as a whole.
For example, a humanist may advocate for [support] equal rights and opportunities for all people, including freedom of thought, expression, and belief. They may also promote education, science, and art as ways to improve society and enhance human understanding and progress.
Very Simple Definition:
A humanist is a person who thinks that people are important and should be happy.
For example, a humanist may think that everyone should be treated fairly and have the same chances. They may also believe that learning, science, and art are good things that can make life better for everyone.