oscillation

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

• noun The action of oscillating.
• noun The state of being oscillated.
• noun A single oscillatory cycle.

from The Century Dictionary.

• noun In mathematics, the difference, for values of x in the interval (x-h, x + h;), between the lowest value that a real function fx of a real variable x cannot exceed and the highest value below which fx cannot fall.
• noun The act of oscillating; a kind of vibration in which a body of sensible size swings backward and forward, not by virtue of its own elasticity merely; a swinging like that of a pendulum.
• noun Variation or fluctuation, in general; wavering.
• noun Same as vibration in the technical acoustical sense.
• noun In music, same as beat, 7 , or beating, 5.
• noun Synonyms Swaying, etc. See vibration.

from the GNU version of the Collaborative International Dictionary of English.

• noun The act of oscillating; a swinging or moving backward and forward, like a pendulum; vibration.
• noun Fluctuation; variation; change back and forth.
• noun See under Axis, and Center.

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

• noun the act of oscillating or the state of being oscillated
• noun a regular periodic fluctuation in value about some mean
• noun a single such cycle
• noun mathematics (of a function) defined for each point in the domain of the function by , and describes the difference (possibly ∞) between the limit superior and limit inferior of the function near that point.

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

• noun the process of oscillating between states
• noun a single complete execution of a periodically repeated phenomenon
• noun (physics) a regular periodic variation in value about a mean