1 lavish, bountiful, generous, liberal, ample, substantial, huge, enormous:
They paid a princely sum for their stately home in Surrey.
2 lavish, magnificent, splendid, luxurious, majestic, royal, regal, sumptuous, superb, Colloq ritzy, swank(y), posh, plush:
The hotel laid on princely accommodation for us with rooms overlooking the sea
3 royal, noble, regal, sovereign, of royal or noble blood or rank:
Who would have thought that our humble home would ever shelter a princely guest?