Final answer:
Partial hair coloring refers to any technique that involves lightening or coloring only a portion of the hair. This can be done using semi-permanent or permanent hair color.
Step-by-step explanation:
Partial hair coloring refers to any technique that involves lightening or coloring only a portion of the hair. This can be done using semi-permanent or permanent hair color. Semi-permanent hair color, which washes out over time, is unable to lighten hair, while permanent hair color chemically alters the hair structure and lasts until it is cut away. Hair coloring can be done professionally or at home, and there are various types of hair dye available, including temporary rinses and plant-based dyes.