Noun:
1: muse in ancient Greek mythology any of 9 daughters of Zeus and Mnemosyne; protector of an art or science
2: muse the source of an artist's inspiration; "Euterpe was his muse"
Verb:
1: mull over, think over, muse, mull, ponder, ruminate, excogitate, speculate, contemplate, meditate, chew over, reflect 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"