(intransitive) To vacillate. / (dated, intransitive) To turn round entirely to the opposite point.

An agricultural system in which plots of land are cultivated temporarily, then abandoned (usually when the soil shows signs of exhaustion, or when overrun by weeds) and allowed to revert to their natural vegetation.

(economics) a change in taxation that eliminates or reduces some taxes and establishes or increases others, thereby keeping the overall revenue the same

(linguistics) the process whereby a speech community shifts to a different language

An early evening shift of work.

(linguistics, phonology) A phonological modification of a vowel system in which a change in a particular vowel causes other adjacent vowels to also change in order to avoid vowel mergers.

To surreptitiously restore a deck of cards to their original sequence after having cut the deck.

Alternative form of shift one's ground

the person who leads a shift (at a job)

(US) manual transmission