a written declaration certifying to a person's character, conduct, or qualifications, or to the value, excellence, etc., of a thing; a letter or written statement of recommendation.

something given or done as an expression of esteem, admiration, or gratitude.

pertaining to or serving as a testimonial

a testimonial dinner for the retiring dean.

noun

affidavit , appreciation , attestation , certificate , character , commemoration , commendation , confirmation , credential , degree , endorsement , evidence , homage , honor , indication , manifestation , memorial , memorialization , monument , ovation , plug * , proof , recommendation , reference , remembrance , salute , salvo , say-so , show , sign , symbol , testament , testimony , token , voucher , witnessnotes:a testament is a document in which something is testified to (will , covenant , book of the bible); a testimonial is a written or spoken expression of regard for a person\'s service or accomplishments , authentication , corroboration , demonstration , substantiation , validation , verification , warrant , tribute , citation , gala , plaudit