Having or showing eagerness or enthusiasm. adjective
She is keen to start her new job.
He was keen on learning the guitar.
Sharp or penetrating, in particular. adjective
The keen blade sliced through the rope easily.
He has a keen sense of smell.
Intellectually alert; having a quick and penetrating mind. adjective
She has a keen mind for solving complex problems.
His keen insights into the market trends helped the company succeed.
Highly developed; acute. adjective
Dogs have a keen sense of hearing.
He has a keen eye for detail.
A lamentation for the dead uttered in a loud wailing voice or sometimes in a wordless cry. noun
The mourners gathered to keen for the deceased.
The sound of keening filled the air at the funeral.