Definition of "rarefies" []

• Third-person singular simple present indicative form of rarefy. (verb)

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• "Dioscor. wonders the physicians of his time made no more use of it, because it rarefies and cleanseth: we use it to this purpose in our ordinary beer, which before was thick and fulsome."
• "Lastly, it is very possible that apples and dry figs exhale some such thing as this, which rarefies and attenuates the heat of the beasts; for some things have a natural tendency as well to weaken as to refresh different creatures."
• "Besides, they say dough will be leavened sooner in the full, for then, though the leaven is scarce proportioned to the meal, yet it rarefies and leavens the whole lump."