تَاسِعٌ
1.
[Making to be nine with himself, or itself: and hence, ninth]. You say, هُوَ تَاسِعُ تِسْعَةٍ [He is the ninth of nine]: and تَاسِعُ ثَمَانِيَةٍ [He is making eight to be nine with himself]: but it is not allowable to say, تَاسِعٌ تِسْعَةً. (TA.)
2.
[تَاسِعَ
عَشَرَ and تَاسِعَةَ عَشْرَةَ, the former masculine and the latter feminine, meaning Nineteenth, are subject to the same rules as ثَالِثَ عَشَرَ and its feminine, explained in article ثلث, q. v.]