reflect deeply on a subject; I mulled over the events of the afternoon; philosophers have speculated on the question of God for thousands of years; The scientist must stop to observe and start to excogitate

[ Syn: chew over , think over , ponder , excogitate , contemplate , muse , reflect , mull , mull over , ruminate , speculate ]

think intently and at length, as for spiritual purposes; He is meditating in his study

[ Syn: study , contemplate ]