locks
n. countable C1 Advanced US //ˈɫɑks// UK //lˈɒks// locks
n. a person's hair, especially when it is long, thick, or healthy. It is a slightly more poetic or stylish way to talk about hair.
n. a person's hair, particularly when considered in terms of its length, texture, or aesthetic appeal. Often used in the plural to suggest abundance or beauty; informal or literary in register.
She spent hours brushing her long, golden locks.
The actor had to cut his famous flowing locks for a new role in a historical drama.
The shampoo advertisement featured a model with shimmering, chestnut locks that seemed to catch every ray of light as she moved through the garden.
Usage
Almost always used in the plural form when referring to a head of hair.