1. Somewhat sick; disposed to illness; attended with disease; as, a sickly body. This physic but prolongs thy sickly days. (Shak)
2. Producing, or tending to, disease; as, a sickly autumn; a sickly climate.
3. Appearing as if sick; weak; languid; pale. The moon grows sickly at the sight of day. (Dryden) Nor torrid summer's sickly smile. (Keble)
4. Tending to produce nausea; sickening; as, a sickly smell; sickly sentimentality.
Synonym: diseased, ailing, infirm, weakly, unhealthy, healthless, weak, feeble, languid, faint.
Origin: Sicklier; Sickliest.