Th or TH may refer to: Language. Eth (ð), a letter used in Old English, Icelandic, Faroese and Elfdalian. Th (digraph), a digraph in the Roman alphabet. Pronunciation of English th aspects of this digraph in English. Voiced dental fricative /ð/, a type of consonantal sound in some languages. Voiceless dental fricative /θ/, a type of consonantal sound in some languages. Thai language (ISO 639 code), the national and official language of Thailand. Thorn (letter) (þ), a letter in Old Norse, Old English, Icelandic and related languages.
https://en.wikipedia.org/wiki/TH