The term 'regular' can be defined in many ways. The crossword solutions for this term include 'SERIAL' (6 letters), 'SAME' (4 letters), 'CONSTANT' (8 letters), 'ESTABLISHED' (11 letters), 'FIXED' (5 letters), 'FLAT' (4 letters), 'EVEN' (4 letters), 'USUAL' (5 letters), 'NORMAL' (6 letters), 'PATRON' (6 letters), 'habitue' (7 letters), 'UNIFORM' (7 letters), and 'PERIODIC' (8 letters). These words all describe something that is consistent, unchanging, and predictable. For example, something that is 'SERIAL' is done in a sequence or order, while something that is 'CONSTANT' remains the SAME over time. Similarly, something that is 'ESTABLISHED' has been set in place, and something that is 'FIXED' does not change. Additionally, something that is 'FLAT' is EVEN and level, and something that is 'EVEN' is balanced and symmetrical. Furthermore, something that is 'USUAL' is expected or customary, and something that is 'NORMAL' is typical or ordinary. Finally, something that is 'PATRON', 'habitue', 'UNIFORM', or 'PERIODIC' is repeated or done regularly.