a long, thin strand of cotton, nylon, or other fibres used in sewing or weaving

he had a loose thread on his shirt

the thread that bound them had snapped

a theme or characteristic running throughout a situation or piece of writing

a major thread running through the book is the primacy of form over substance

a helical ridge on the outside of a screw, bolt, etc. or on the inside of a cylindrical hole, to allow two parts to be screwed together

clothes

his fine threads and fashionable specs

pass a thread through the eye of (a needle) or through the needle and guides of (a sewing machine)

I can't even thread a needle

she threaded up the machine with the right cotton

pluck hairs from (the eyebrows or another part of the body) using a twisted cotton thread

I had my eyebrows threaded today

cut a screw thread in or on (a hole, screw, bolt, etc.)

we're laser-cutting holes to be threaded for screws