What is tightlining? How to master the technique, according to two makeup artists

Side view of woman sat in front of a window applying eyeliner pencil while looking into a compact mirror .

Want to define and accentuate your eyes? Tightlining is a makeup trick that can do exactly that – but if you aren't a makeup pro, you might not be 100% sure what it is or how it works.

Before we get into the specifics, tightlining is a technique often used by professionals, which involves using the best eyeliner to define your eyes, also making your lashes look thicker and fuller in the process.