Definition: 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"
contemplate 5
Definition: consider as a possibility; "I contemplated leaving school and taking a full-time job"
contemplate 6
Definition: think intently and at length, as for spiritual purposes; "He is meditating in his study"
contemplate 7
Definition: look at thoughtfully; observe deep in thought; "contemplate one''s navel"