timing

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The regulation of occurrence, pace, or coordination to achieve a desired effect, as in music, the theater, or athletics.
• noun The synchronization of the sparking of the plugs with the movement of the pistons in an internal-combustion engine.

from The Century Dictionary.

• noun In the design and construction of machinery, the proper adjustment of the parts of any machine so that its operations will follow in a given order to produce a given result, as in the movement of the needle, shuttle, and feed of a sewing-machine in consecutive order.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun obsolete An occurrence or event.
• noun uncountable The regulation of the pace of e.g. an athletic race, the speed of an engine, the delivery of a joke, or the occurrence of a series of events.
• noun uncountable The time when something happens.
• noun uncountable The synchronization of the firing of the spark plugs in an internal combustion engine.
• noun countable An instance of recording the time of something.
• verb Present participle of time.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun the regulation of occurrence, pace, or coordination to achieve a desired effect (as in music, theater, athletics, mechanics)
• noun the time when something happens