brightennoun 1) очищать, полировать (металл); придавать блеск (тж. brighten up) The new paint will brighten up the house.
brighten noun
brightennoun 2) прояснять(ся) (тж. brighten up) The day brightened up after the storm passed.
brighten noun
brightennoun 3) улучшать(ся) (о перспективах и т.п.)
brighten noun
brightennoun 4) наполнять радостью, радовать (тж. brighten up) Let's brighten up the party with some loud music. Mary brightened up when she was told that Jim was coming after all.