thinker

B2 · Upper Intermediate Countable noun

n. someone who spends a lot of time considering their own thoughts or ideas.

n. one who engages in the act of contemplation, meditation, or reflection.

“He was a quiet thinker who preferred to listen before speaking his mind.”

“Even as a child, he was a deep thinker, often found staring out the window lost in his own imagination.”

C1 · Advanced Countable noun Slang · Informal

n. a casual way to talk about your brain or your mind.

n. the brain or the seat of intellect. Used as a colloquial substitute for the physical or functional mind.

“Use your thinker and see if you can solve this puzzle.”

“After a long day of complex calculations, he felt like his thinker was completely fried.”

C1 · Advanced Countable noun Slang · Informal

n. a question or problem that is very hard to answer and requires a lot of thought.

n. a difficult question, puzzle, or conundrum that necessitates significant cognitive effort to resolve.

“That last question on the math test was a real thinker.”

“The riddle the old man posed was a real thinker, keeping the group occupied for the entire journey.”