The definition of ail is to feel sick or have pain.verb
An example of ail is for an older person to have poor health.YourDictionary definition and usage example. Copyright © 2013 by LoveToKnow Corp.
Origin: ME eilen < OE eglian, to afflict with dread, trouble < egle, harmful; akin to Goth agls, infamous, ON agi > awe
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verb ailed, ail·ing, ails verb, intransitive
Origin: Middle English eilen, from Old English eglian, from egle, troublesome.