1. Consisting of oil; containing oil; having the nature or qualities of oil; unctuous; oleaginous; as, oily matter or substance.
2. Covered with oil; greasy; hence, resembling oil; as, an oily appearance.
3. Smoothly subservient; supple; compliant; plausible; insinuating. This oily rascal. His oily compliance in all alterations.
(Science: botany) (Fuller) Oily grain, the sesame. Oily palm, the oil palm.
Origin: Oilier; Oiliest.