think big
To have grand or ambitious plans or ideas. You shouldn't settle for a lousy office job you don't really like—try to think big about your future! It's clear that the company was thinking big when they came up with the idea for this product.
think big
Be ambitious, as in There's no point in moving to a place the same size; we have to think big and plan for expansion . [Colloquial; mid-1900s]
think big
be ambitious. informalthink ˈbig
(informal) have big plans for the future; be ambitious: If you want to be successful in life, you’ve got to think big. think big
To plan ambitiously or on a grand scale.