Of, caused by, or associated with sickness: a sickly pallor.
Conducive to sickness: a sickly climate.
Causing nausea; nauseating.
Lacking vigor or strength; feeble or weak: a sickly handshake.
tr.v.
sick·lied, sick·ly·ing, sick·lies To make sickly: "Timidity . . . sicklies the whole cast of thought in action"(Henry Adams). sick'li·ness n., sick'ly, sick'li·ly adv.