I'DLY, adverb In an idle manner; without employment. 1. Lazily; sluggishly. 2. Foolishly; uselessly; in a trifling way. A shilling spent idly by a fool, may be saved by a wiser person. 3. Carelessly; without attention. 4. Vainly; ineffectually; as, to reason idly against truth.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI