This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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adj. Deep in thought; contemplative.

n. Contemplation; meditation.

n. A product of contemplation; a thought. "an elegant tapestry of quotations, musings, aphorisms, and autobiographical reflections” ( James Atlas).

v. Present participle of muse.

adj. Absorbed in thought; contemplative

n. thought, meditation, contemplation

adj. Thinking long and intensely.

n. The act of pondering; meditation; thoughtfulness.

Meditative; thoughtful; preoccupied.

adj. deeply or seriously thoughtful

n. a calm, lengthy, intent consideration

"I know that I have been accused of foolishness in musing whether we are heading for a Third World War, but the news that Barack Obama's Vice President, the inept Joe Biden, is due to make a keynote foreign policy speech at an international conference in Munich fills me with a sense of dread."

thoughtful   

musingly   

brooding    broody    contemplative    meditative    pensive    pondering    reflective    ruminative    thoughtful    abstracted   

muse   

abusing    accusing    amusing    boozing    bruising    choosing    confusing    cruising    defusing    diffusing