highlighter

noun
  1. A fluorescent pen used to mark important passages of text by coloring them with a transparent color. noun
    She used a highlighter to mark the key points in her textbook.
    The teacher recommended using a highlighter to emphasize important information in the notes.
  2. A cosmetic product used to accentuate certain features of the face by adding a luminous glow. noun
    She applied highlighter to her cheekbones for a radiant look.
    The makeup artist used a highlighter to enhance the model's features under the studio lights.