(redirected from Windows Media Audio 9 Lossless) Also found in: Wikipedia.
A digital audio file format from Microsoft that compresses an audio CD to a range of 206 to 411MB, at bit rates of 470 to 940 Kbps. Mathematically equivalent to the original audio track, WMA Lossless provides the highest quality WMA format for ripping audio CDs. It uses the same .WMA file extension as other Windows Media Audio formats (see Windows Media formats). See lossless compression.