1. A traditional or conventional structure, style, or method that follows established classical principles or conventions
The symphony was written in classical form.
A sinfonia foi escrita em forma clássica.
2. In music, architecture, or art: a structure that adheres to the principles and aesthetics of classical periods (Ancient Greece/Rome or the Classical period in music)
The building's classical form reflects Greek architectural principles.
A forma clássica do edifício reflete os princípios da arquitetura grega.
3. A standardized or traditional approach or presentation method
She preferred the classical form of essay writing.
Ela preferia a forma clássica de escrever ensaios.