expert
word
Definition
An expert is a person who knows a lot about a particular subject or skill because of study or experience. It can also describe someone who does something very well.
Usage & Nuances
Often followed by 'in', 'on', or 'at': 'an expert in finance', 'an expert on climate policy', 'expert at fixing bikes'. As a noun, it is common in professional and academic contexts; as an adjective, it sounds natural in phrases like 'expert advice' or 'expert help'. Do not confuse it with 'experienced': an experienced person has done something many times, but an expert is seen as highly knowledgeable or skilled.
Example Sentences
My sister is an expert in math.
basic
She gave me expert advice.
basic
We need an expert to fix this machine.
basic
Don't ask me—I'm no expert when it comes to cars.
natural
The company brought in an expert to review the data.
natural
He's not just good at cooking—he's basically an expert.
natural