lesbianadjective
homosexual
noun[ C ]
 formalold-fashioneduk /ˌhəʊ.məˈsek.ʃu.əl/ us /ˌhoʊ.moʊˈsek.ʃu.əl/
a man who is sexually or romantically attracted to men, or a woman who is sexually or romantically attracted to women:
During that period in American history, men who were thought to be Communists or homosexuals were routinely interrogated and sometimes imprisoned.

Note:

Except when used in older scientific or technical writing, the noun homosexual is now considered offensive by many people.

Related word

homosexuality

homosexual | American Dictionary

homosexual
noun[ C ]
us/ˌhoʊ·məˈsek·ʃu·əl/
a person who is sexually attracted to people of the same sex

homosexual

adjective[ not gradable ]us/ˌhoʊ·məˈsek·ʃu·əl/

homosexuality

noun[ U ]us/ˌhoʊ·məˌsek·ʃuˈæl·ət̬·i/