lashes
n. countable B1 Intermediate US //ˈɫæʃɪz// UK //lˈæʃɪz// lash·es
n. the short hairs that grow on the edges of your eyelids. They help protect your eyes from dust and dirt.
n. the short, curved hairs growing from the margins of the eyelids. Often used in the plural when referring to cosmetic appearance or biological function.
She has very long, dark lashes.
The makeup artist applied a thin layer of waterproof mascara to the model's lashes to make them look thicker.
Biologically, lashes serve as a sensory trigger, causing the eyelid to close reflexively when they detect dust or small insects approaching the sensitive surface of the eye.
Usage
Almost always used in the plural form 'lashes' unless referring to a single hair ('an eyelash').