1. In a way that is genuine, real, or true to its original form
She authentically represents the values of her community.
Ela representa autenticamente os valores de sua comunidade.
2. In a manner that is verifiably true or accurate
The document was authentically signed by the witness.
O documento foi autenticamente assinado pela testemunha.
3. In a sincere and honest way, without pretense
He spoke authentically about his feelings.
Ele falou autenticamente sobre seus sentimentos.