brainybrain‧y /ˈbreɪni/ ●○○ adjective (comparative brainier, superlative brainiest) 
Examples
He always was the brainy one.► see thesaurus at intelligent
ExamplesEXAMPLES FROM OTHER DICTIONARIES
Thesaurus- At school Karen was always one of the brainy ones.
- It's my little sister who's the brainy one.
- Why don't you ask Tom to help you with your homework -- he's incredibly brainy.
- If he hadn't been an incredibly brainy person he would have been an officious one-eyed council clerk or something.
- Only the brainiest of the brainy qualify.
- The brainy men all went along To see that nothing should go wrong.
- The great, brainy apes, including man, arrived in the last 20 million years.
- Why couldn't I have been born to be successful and brainy?
- You're a surprisingly brainy bunch, too.
THESAURUS► intelligent
able to learn easily and think quickly SYN clever, smart American English: having a high level of mental ability, and good at thinking clearly and understanding ideas: · The top universities aim to select the most intelligent students.
► clever especially British English, smart especially American English intelligent, so that you can think and learn quickly and find ways to solve problems: · That was very clever of you. How did you do that?· I wasn’t smart enough to be a lawyer.
► bright intelligent – used especially about children and young people: · He’s a very bright kid.· the brightest student in the class
► brilliant extremely intelligent and good at the work you do: · a brilliant scientist
► gifted a gifted child is much more intelligent than most other children: · a special school for gifted children
► wise able to make good decisions and give sensible advice, especially because you have a lot of experience: · a wise old man
► cunning/crafty good at using your intelligence to get what you want, often by making secret plans or tricking people: · She was cunning enough to keep this latest piece of information secret.· He’s a crafty old devil!
► brainy informal intelligent and good at studying: · My sister is the brainy one in our family.
Longman Language Activatorgood at learning, thinking, and understanding ideas► intelligent having a high level of natural mental ability, so that you are good at thinking, learning, and understanding ideas: · Mark was an intelligent, ambitious young man, with a great future in front of him.· Some scientists claim that dolphins are more intelligent than humans.highly intelligent: · "We're looking for highly intelligent young people, with a genuine interest in their subject," a university spokesman said.
► clever especially British /smart especially American good at learning and understanding things quickly, and at thinking how to solve problems: · He's a smart kid who works hard and is focused on what he wants to do.· My sister was always much cleverer than me at school.it is clever/smart of somebody: · That was very clever of you, How did you do that?it is clever/smart of somebody to do something: · Dick's had a bad injury, and it's probably smart of him not to play sports for a while.
► bright intelligent and likely to be successful - use this especially about children and young people: · Even as a small child, it was obvious that Bobby was very bright.· When I first met her she was a bright young lawyer fresh out of law school.best and brightest: · Companies want to prevent their best and brightest employees from being headhunted by rival organizations.
► have a good mind to be intelligent and able to think about things clearly, understand things quickly, and solve problems well: · Sean's teachers told him that he had a good mind and the ability to be an excellent student.
► have a high IQ to be intelligent according to what you score on a special test: · Both the twins have a high IQ of around 150.· MENSA is an organization for people with high IQs.
► gifted a child who is gifted is much more intelligent and quicker at learning than most other children: · In the past, gifted children have not always been given appropriate educational support.· Bloomsury House is a special school for girls and boys who are exceptionally gifted.
► brainy informal very intelligent and especially good at studying: · At school Karen was always one of the brainy ones.· Why don't you ask Tom to help you with your homework -- he's incredibly brainy.
He always was the brainy one.► see thesaurus at intelligent