Etymology From dis- + mount, probably a calque of Old French desmonter.
1
Ambitransitive To (cause to) get off (something).
She carefully dismounted from the horse.
She carefully dismounted the horse.
1 more example
Cadel Evans was the first to suffer, quickly dismounting and waiting to take a bike from one of his BMC Racing team-mates, only to discover that the first of them had also punctured.2012 July 15, Richard Williams, Tour de France 2012: Carpet tacks cannot force Bradley Wiggins off track, Guardian Unlimited:
2
Computing, Engineering, Mathematics, Natural sciences, Physical sciences, SciencesAmbitransitive To make (a mounted drive) unavailable for use.
The VMS operator tried to dismount the Unix hard drive with the DISMOUNT DISK$NFSMOUNT command, instead of umount /mnt/nfshome.
PROBLEM: A volume periodically dismounts. There are two drives with one volume on each. From time to time, the second volume dismounts and the drive shuts down.1995, Rick Sant'Angelo, NetWare unleashed, page 1130:
3
To come down; to descend.
But now the bright sun ginneth to dismount.1579, Immeritô [pseudonym; Edmund Spenser], “May. Ægloga Quinta.”, in The Shepheardes Calender: […], London: […] Iohn Wolfe for Iohn Harrison the yonger, […], →OCLC: