Definitions
1.nounA reel; a device around which thread, wire or cable is wound, especially a cylinder or spindle.
2.nounA temporary storage area for electronic mail, etc.
3.verbTo wind on a spool or spools.
4.verbTo send files to a device or a program (a spooler or a daemon that puts them in a queue for processing at a later time).
5.nounA small swimming pool that can be used also as a spa.