From BiblePortal Wikipedia

Vine's Expository Dictionary of NT Words [1]

 Matthew 7:22Power.  Acts 2:11 Matthew 21:15

King James Dictionary [2]

Wonderful a. Adapted to excite wonder or admiration exciting surprise strange astonishing.  Job 42 .

Webster's Dictionary [3]

(a.) Adapted to excite wonder or admiration; surprising; strange; astonishing.

Cyclopedia of Biblical, Theological and Ecclesiastical Literature [4]

is the rendering in the A.V. at  Isaiah 9:6 of the Heb. פֶּלֶא , Piel (Sept. Θαυμαστός ; Vulg. Admirabilis), as an epithet of the Messiah, and designates his incomprehensible character as the God-man.