What is "delabialize"

alt. 1 (context transitive phonetics phonology English) To make into a non-labial sound. 2 (context intransitive phonetics phonology English) To become a non-labial sound. vb. 1 (context transitive phonetics phonology English) To make into a non-labial sound. 2 (context intransitive phonetics phonology English) To become a non-labial sound.