to say that something is true or is a fact, although you can not prove it and other people might not believe it
The company claims (that) it is not responsible for the pollution in the river.
He claims to have met the president, but I don't believe him.
The explorer was the first to claim that a new species of butterfly existed in the remote jungle.
The author's book boldly claimed to reveal the secrets of eternal youth, attracting skepticism from the scientific community.
The company's marketing campaign claimed that their product could revolutionize the industry, sparking interest and debate.
Witnesses came forward to claim that they had seen an unidentified flying object in the night sky.
