a secondary school (usually private)
"After graduating from the prestigious arts academy, she received several offers for her portfolio."
an institution for the advancement of art or science or literature
"The members of the Royal Academy gathered to celebrate a new award for outstanding contributions to modern sculpture."
a school for special training
"She enrolled her son at a prestigious acting academy to hone his craft before auditioning for Broadway."
a learned establishment for the advancement of knowledge
"The members of the academy gathered to present their groundbreaking research on renewable energy solutions."
The garden where Plato taught.
"The ancient academy was once a lush garden in Athens where Plato gathered his famous students to discuss philosophy under the shade of plane trees."
In plain English: An academy is a school that focuses on teaching specific subjects or skills.
"She enrolled her daughter in an art academy to learn painting."
Usage: In everyday usage, an academy refers to a private or specialized school that offers specific training in fields like art, music, or business. Do not use this word to describe the ancient Greek garden where Plato taught; that historical reference is too specific for general conversation.
The school for advanced education founded by Plato; the garden where Plato taught.
"Many ancient philosophers would gather at the Academy to discuss mathematics and metaphysics under the guidance of its founder."
The word "academy" comes from Ancient Greek, originally referring to a grove in Athens where Plato taught philosophy. It is named after the mythical hero Akademos, who was believed to have owned the estate.