cer ‧ tif ‧ i ‧ ca ‧ tion /səˌtɪfəˈkeɪʃ ə n, səˌtɪfɪˈkeɪʃ ə n $ sər-/ BrE AmE noun
1 . [uncountable and countable] an official document that says that someone is allowed to do a certain job, that something is of good quality etc:
We successfully completed the certification for open water diving.
2 . [uncountable] the process of giving someone or something an official document that says they are allowed to do a certain job, that something is of good quality etc
certification of
certification of competence