vast; huge; very great

an immense territory.

immeasurable; boundless.

Informal . splendid

You did an immense job getting the project started.

adjective

little , miniature , minute , small , teeny , tiny

adjective

barn door , boundless , brobdingnagian * , colossal , elephantine , endless , enormous , eternal , extensive , giant , gigantic , great , gross , huge , humongous , illimitable , immeasurable , infinite , interminable , jumbo * , limitless , mammoth , massive , measureless , mighty , monstrous , monumental , prodigious , stupendous , super , titanic * , tremendous , unbounded , vast , behemoth , brobdingnagian , bunyanesque , cyclopean , gargantuan , gigantesque , herculean , heroic , jumbo , massy , mastodonic , monster , mountainous , pythonic , titanic , big , excellent , good , grand , large