not ever; at no time in the past or future; "I have never been to China"; "I shall never forget this day"; "had never seen a circus"; "never on Sunday"; "I will never marry you!"
not at all; certainly not; not in any circumstances; "never fear"; "bringing up children is never easy"; "that will never do"; "what is morally wrong can never be politically right"
having existence or being or actuality; "an attempt to refine the existent machinery to make it more efficient"; "much of the beluga caviar existing in the world is found in the Soviet Union and Iran"
a pernicious and malign influence that is hard to get rid of; "racism is a pestilence at the heart of the nation"; "according to him, I was the canker in their midst"
the act of leaving secretly or without explanation
the event of passing out of sight
ceasing to exist; "he regretted the disappearance of Greek from school curricula"; "what was responsible for the disappearance of the rainforest?"; "the disappearance of resistance at very low temperatures"
the activity of operating something (a machine or business etc.); "her smooth operation of the vehicle gave us a surprisingly comfortable ride"
a planned activity involving many people performing various actions; "they organized a rescue operation"; "the biggest police operation in French history"; "running a restaurant is quite an operation"; "consolidate the companies various operations"
a process or series of acts especially of a practical or mechanical nature involved in a particular form of work; "the operations in building a house"; "certain machine tool operations"
a medical procedure involving an incision with instruments; performed to repair damage or arrest disease in a living body; "they will schedule the operation as soon as an operating room is available"; "he died while undergoing surgery"
activity by a military or naval force (as a maneuver or campaign); "it was a joint operation of the navy and air force"
a business especially one run on a large scale; "a large-scale farming operation"; "a multinational operation"; "they paid taxes on every stage of the operation"; "they had to consolidate their operations"
(computer science) data processing in which the result is completely specified by a rule (especially the processing that results from a single instruction); "it can perform millions of operations per second"
process or manner of functioning or operating; "the power of its engine determine its operation"; "the plane's operation in high winds"; "they compared the cooking performance of each oven"; "the jet's performance conformed to high standards"
the state of being in effect or being operative; "that rule is no longer in operation"
give or bring back; "Restore the stolen painting to its rightful owner"
bring back into original existence, use, function, or position; "restore law and order"; "reestablish peace in the region"; "restore the emperor to the throne"
return to its original or usable and functioning condition; "restore the forest to its original pristine condition"