Mah·ler (mä'lər) Austrian composer and conductor of the Vienna State Opera House (1897-1907) whose completed works, most notably Das Lied von der Erde (1908) and Symphony Number 9 (1909), are unrestricted by conventional musical forms.
An Austrian composer and conductor of the late nineteenth and early twentieth centuries. Mahler wrote long, intensely emotional works for large orchestras, including nine symphonies and part of a tenth.