Noun
A device attached to a mowing machine for raising the uncut fallen grain and marking the limit of the swath.
Source: Webster's dictionaryConditioning can also refer to the rollers inside a swather that crimps the alfalfa to help squeeze out the moisture. Source: Internet
Hay can be raked into rows as it is cut, then turned periodically to dry, particularly if a modern swather is used. Source: Internet