Walking seems to have become Rousseau's chosen mode of being because within a walk he is able to live in thought and reverie, to be self-sufficient, and thus to survive the world he feels has betrayed him.
-- Rebecca Solnit, Wanderlust: A History of Walking
He was pulled out of his reverie by the buzzing of his cell phone.
-- Robert O'Harrow, No Place to Hide
From reveries so airy, from the toil Of dropping buckets into empty wells, And growing old in drawing nothing up.
-- William Cowper, The Task. Book iii. The Garden. Line 188.
Reverie is from Middle English, revelry, from Old French, from rever, to dream.