The delay was occasioned principally by an unexpected variation in Leary's habits.

They take their thrust from unexpected variations to the scheme and from the meanings this strategy might suggest.

As he settled into his story, it opened into interior stories, and variations led to other, completely unexpected, variations.

This "revenge" factor may be no more than an example of complex systems at work: when we alter one element slightly, large and unexpected variations can occur.

Companies and financiers continue to search for new ways to protect themselves from, or take advantage of, the risk of unexpected variations in price.

The steps required to carry out the process are defined, and performance measures are continuously monitored in order to detect unexpected variations in the process.

On Nov. 8, one of three so-called control moment gyros gave off odd vibrations and an unexpected variation in electrical current in a maneuver.

The attractive dances include unexpected and skillful variations on theatricalized folk themes that we have seen elsewhere.

It is too soon to understand the reason for this unexpected variation with latitude.

A switcheroo is a sudden unexpected variation or reversal often associated with a joke (sometimes "the old switcheroo").