Definition of agoggle in US English:

agoggle

(also a-goggle)

adverb

  • In a goggling position or fashion; with (or as though with) the eyes protuberant or staring, especially in expectation, amazement, etc.

adjective

  • Of the eyes: goggling, protuberant, staring, especially with expectation, amazement, etc. Also of a person: having such a demeanour.

Origin

Early 16th century (in an earlier sense). From a- + goggle.

Pronunciation

agoggle

/əˈɡɒɡl/