I. |ən+ verb
Etymology: un- (II) + dock (to take a ship to a dock)
transitive verb
1. : to take (a ship) away from a dock or wharf
2. : to take (a ship) out of dry dock
intransitive verb
: to move away from a dock (as at sailing time)
some luggage in new trunks came on board in the afternoon. We undocked at midnight — Joseph Conrad
II. transitive verb
: uncouple
undock the lunar module from the command module