adjective - easily bent, shaped, or manipulated without breaking; soft and pliable in texture
adjective, American English, informal - strange, eccentric, or slightly crazy, often in an amusing or charming way.
noun - a cell in the nervous system that sends and receives electrical signals
noun, technical - a space through which light passes in an optical or photographic instrument
adjective, American English - someone who is unreliable or behaves in an odd or unpredictable way