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

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

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

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

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

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