What does spool mean?
A spool is a simple cylindrical holder or reel used to wind and store thread, wire, film, cable, or other flexible material. Its flanges help keep the material from slipping off, while the central core provides a convenient way to hold the object in place. The word also refers to the reel or the wound material itself, as in a spool of thread. In technical contexts, a spool can be a rotating cylinder that controls the movement of paper, film, or recording media, and in computing, spooling can mean temporarily storing data for later processing or output. As a verb, spool means to wind something onto a reel or to reel in a line or cable. Although it may sound technical, spool is especially familiar in sewing, crafts, fishing, filmmaking, and hardware.
A cylindrical holder or reel on which thread, wire, film, cable, or similar material is wound.
"The craft room contained a box full of empty cardboard spools."
A spool may refer either to the physical holder or to the reel of material wound onto it.
To wind material onto a spool or reel, or to reel in a line, cable, or film.
"The crew spooled the cable onto a drum beside the truck."
Often transitive, though it can also be used intransitively when the material being wound is understood.
The plural is used for individual reels or holders and, collectively, for multiple reels or wound quantities.
"The technician replaced the empty spools with full ones."
A spool is both a simple storage tool and one of the most recognizable objects in sewing, fishing, computing, and filmmaking.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does spool come from?
The English word developed through Middle English from an older Germanic form meaning a reel or winding device. It belongs to a family of related words found in languages such as German, Dutch, and Scandinavian, including Spule, spoel, and spole. Across these languages, the central sense has remained the winding of thread, wire, or another material around a cylindrical core.
Related word forms
How spool is actually used
In general use, spool is common in British and American English. In computing and data processing, it can refer to temporary storage used while transferring or processing information, as in print spooling. As a verb, it is often transitive, although it can also be used intransitively.