Definition of RANK ... intransitive verb 1 : to form or move in ranks 2 : to take or have a position in relation to others <ranks first in her class> smoking ranks higher in the list of no-no's than drowning kittens. in the list of things that are regarded as 'absolutely not to be done', the practice of smoking is placed closer to the top of the list than the practice of killing kittens by drowning them.
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