thin ‧ ning /ˈθɪnɪŋ/ BrE AmE adjective
[ Word Family: noun : ↑ thinness , ↑ thinner ; adjective : ↑ thin , ↑ thinning ; verb : ↑ thin ; adverb : ↑ thinly ]
someone with thinning hair is losing their hair
thin ‧ ning /ˈθɪnɪŋ/ BrE AmE adjective
[ Word Family: noun : ↑ thinness , ↑ thinner ; adjective : ↑ thin , ↑ thinning ; verb : ↑ thin ; adverb : ↑ thinly ]
someone with thinning hair is losing their hair
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012