testimonial
noun
uk/ˌtestɪˈməʊniəl/ us [ C ] MARKETING
a formal written statement about the qualities of a product or service:
Financial Mail exposed the company's use of fake or doctored customer testimonials in advertising.
a testimonial from sb Ask for testimonials from satisfied clients and post them on your website.
[ C ] HR
a formal written description of someone's abilities, character, and qualities given by a previous employer:
a testimonial from sb We have received a glowing testimonial from her former employer.
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reference noun
[ C or U ]
proof that something exists or is true:
be a testimonial to sth The achievement of record profits is a testimonial to better financial management in recent years.
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testament