Homologation is a technical term, derived from the Greek homologeo (ὁμολογέω) for "to agree", which is generally used in English to signify the granting of approval by an official authority. This may be a court of law, a government department, or an academic or professional body, any of which would normally work from a set of strict rules or standards to determine whether such approval should be given. The word may be considered very roughly synonymous with accreditation, and in fact in French may be used with regard to academic degrees (see apostille). Certified is another possible synonym, while to homologate is the infinitive verb form.
Perhaps the closest this word comes to everyday usage is in reference to racing vehicles. In motorsports a vehicle must be homologated by the sanctioning body to race in a given league, such as NASCAR, World Superbikes, International Level Kart Racing or other sportscar racing series.