One who spends time thinking, contemplating or meditating. / An intellectual, such as a philosopher or theologian. / (slang) The brain, mind. / (slang) A poser; a conundrum that requires some thinking.

plural of thinker

Alternative spelling of freethinker

(idiomatic) A person whose thoughts are profound; an intellectual.

plural of deep thinker

One who engages in wishful thinking.

plural of wishful thinker

plural of lateral thinker

One who uses lateral thinking.

Alternative form of freethinker