Incomparable, a.
Etymology: [L. incomparabilis: cf. F. incomparable. See In- not, and Comparable.]
Not comparable; admitting of no comparison with others; unapproachably eminent; without a peer or equal; matchless; peerless; transcendent. A merchant of incomparable wealth. Shak. A new hypothesis . . . which hath the incomparable Sir Isaac Newton for a patron. Bp. Warburton. -- In*com"pa*ra*ble*ness, n. -- In*com"pa*ra*bly, adv. Delights incomparably all those corporeal things. Bp. Wilkins.
Shades of meaning
Fernald has no entry of its own for incomparable; he lists it under rare.
He lists it without comment; the entries above explain its neighbors.