Ad infinitum is a Latin phrase meaning 'to infinity' or 'without end'. It is often used to describe something that continues indefinitely, such as a task or an argument. The crossword solutions for the term ad infinitum are ETERNITY (8 letters), FOREVER (7 letters), EVER (4 letters), ENDLESSLY (9 letters), noend (5 letters), onandon (7 letters), and prblitz (7 letters). All of these words can be used to describe something that goes on without end, and thus they all fit the definition of ad infinitum.