Used as a verb it means to bleach the hair and remove current color.
When used as a noun it refers to the chemical composition designed to remove color from the hair. Bleach is sometimes referred to as a pre-lightening or decolorizing treatment.
Daily Hair Tip
To create retro-look hair waves liberally apply a good setting gel, then use massive clips to hold hair in desired shape. Use gentle hairdryer heat, release clips and enjoy lots of new waves.