certKK [ˋsɝt] /ˈsɝt/名詞1鐵定的事、必然的事英式口語With that lineup, their win is a dead cert.以這樣的陣容,他們獲勝是鐵定的事。2證書、憑證、證照口語,certificate 的縮寫Remember to renew the security cert before it expires.記得在安全憑證到期前更新。