1. in accordance with truth or fact or reality (Freq. 1) - she was now truly American - a genuinely open society - they don't really listen to us • Syn: truly, really • Derived from adjective: real (for: really), genuine, true (for: truly) 2. genuinely; with authority - it is authentically British • Syn: authentically • Derived from adjective: genuine, authentic (for: authentically)