a long thin string of cotton, silk etc used to sew or weave cloth:
for sewing[uncountable and countable]DCTIM
I'm looking for a needle and thread.
hand-sewn with gold and silver thread
a spool of thread (=small object that thread is wound around)
an idea, feeling, or feature that connects the different parts of an explanation, story etc:
a common thread running within his work
His mind wandered, and he lost the thread of what she was saying (=was no longer able to understand it).
a thread running through the film
a thread of spirituality in her work
to begin something again after a long period, especially a relationship or way of life:
They had known each other as children, and were picking up the threads of their friendship.
a series of messages concerning the same subject, written by members of an Internet discussion group:
I'd like to refer to something that was posted in an earlier thread.
a long thin line of something, such as light, smoke etc
The Colorado River was just a thread of silver, 4000 feet below.
a continuous raised line of metal that winds around the curved surface of a screw
on a screw[countable]DT
7 [plural] American English old-fashioned