state-of-the-art

more and more (used to express a progressive increase)

plural of nom de plume

more than ever

fountain pen

to be more Catholic than the Pope; to make more effort to defend someone's interests than they make themselves

to be more Catholic than the Pope, to go overboard, to overdo it; to be an extremist, to have extreme views

more or less (approximately)

easier said than done (easy to propose, but difficult to accomplish)

most significant bit (bit of the largest order)