dreamer

Concise Oxford English Dictionary © 2008 Oxford University Press:
dream/driːm/

▶noun

• 1 a series of thoughts, images, and sensations occurring in the mind during sleep.

  ■ a state of mind in which someone is not fully aware of their surroundings: he walked around in a dream.

• 2 a cherished hope or ideal; a fantasy.

  ■ informal a wonderful or perfect person or thing.

▶verb (past and past part. dreamed /drɛmt, driːmd/ or dreamt /drɛmt/)

• 1 experience dreams during sleep.

• 2 indulge in daydreams.

  ■ (dream something up) imagine or invent something.

• 3 [with neg.] contemplate the possibility of: I never dreamed anyone would take offence.

– phrases
like a dream informal very easily or successfully.

– derivatives
dreamer noun,
dreamful adjective (literary),
dreamless adjective,
dreamlike adjective.

– origin ME: of Gmc origin.