English Reference
adjective

certified

adj.
US /ˈsɝtəˌfaɪd/ UK /sˈɜːtɪfˌaɪd/ cer·ti·fied

  1. 01 B2 Upper Intermediate

    having a document that proves you have the skills or training for a job.

    having been issued a certificate or license that confirms professional competence or qualification.

    Simple

    You should only hire a certified electrician to fix the wiring in your house.

    In context

    The hospital requires all nursing staff to be certified in advanced life support before they can work in the intensive care unit.

  2. 02 B2 Upper Intermediate

    officially checked and confirmed to be true or of high quality.

    guaranteed as meeting a specific standard or being genuine through a formal process of verification.

    Simple

    The shop sells certified organic vegetables that are grown without chemicals.

    In context

    The accountant provided a certified copy of the financial statement to ensure the investors that the figures were accurate.

Usage certified eclipse

So before you start, speak to a certified exercise physiologist or physiotherapist.

ScienceDaily· 16 Aug 2026

Certified eclipse glasses will be available as part of a "relaxed evening".

BBC News· 12 Aug 2026
This entry
Level B2 · Upper Intermediate
Frequency Common
Updated