COGITO ERGO SUM Meaning of COGITO ERGO SUM in English cogito ergo sum BrE AmE ˌkɒɡ ɪt əʊ ˌɜːɡ əʊ ˈsʊm § ˌ•ət-, -ˈsʌm AmE ˌkoʊɡ ə toʊ ˌɝːɡ oʊ ˈsʊm -ˌerɡ- Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012