Definitions

1. noun

a substance used to lighten or whiten something, especially hair or a surface

“The hairdresser applied a lightener to remove the dark roots.”

2. verb

to make something lighter or whiter, especially hair or a surface

“The stylist lightened her hair to a platinum blonde color.”

3. verb

to make something seem less serious or less threatening

“The politician tried to lightener the economic situation by offering tax cuts.”