1. Incapable of being observed; imperceptible, unnoticeable.
1651. Hobbes, Leviath., II. xxix. 169. Which accidents … are not supernaturall, but onely … unobservable.
1664. Boyle, Exp. touching Colours, 114. Little and Singly Unobservable Images of the Lucid Body.
a. 1715. South, Serm., IV. 163. Such small, such contemptible, and almost unobservable Hints have sometimes unraveled … the deepest-laid Villanies.
1895. Baring-Gould, Noémi, xiii. He had to beware of putting his hand on fire that was unobservable by daylight.
† 2. Undeserving of notice or remark. Obs.
1665. J. Webb, Stone-Heng (1725), 16. It is not unobservable, that these Stones seem to have been … more entire, than when Mr. Jones made his Survey.
1675. M. Clifford, Hum. Reason, 40. It is not unobservable, that the Unity of the Church of God is compared [etc.].
