immensity /ɪˈmɛn.sɪ.ti/noun 2forms 1phrases 1 noun2 •The characteristic or state of being immense.Thou, whose exterior semblance doth belie / Thy soul's immensity; […] — 1807 •An immense object. formsimmensities Phrases with immensity temple of immensityThe universe or the complete overhead expanse of the heavens, especially as conceived as an object of religious reverence.