Defines a recommended header cell width. Use the width CSS property instead, as this attribute is deprecated. The <th> may only be used within a <tr> element. In simple contexts, using the scope attribute on header cells (<th> elements) is redundant because scope is inferred.

⟨th⟩ is used in academic transcription systems to represent letters in south and east Asian alphabets that have the value /tʰ/. According to the Royal Thai General System of Transcription, for example, ⟨th⟩ represents a series of Thai letters with the value /tʰ/.

Latin Th digraph. Th is a digraph in the Latin script. It was originally introduced into Latin to transliterate Greek loan words. In modern languages that use the Latin alphabet, it represents a number of different sounds. It is the most common digraph in order of frequency in the English language.

The letter thorn was used for writing Old English very early on, as was ð, called eth. Unlike eth, thorn remained in common use through most of the Middle English period. Both letters were used for the phoneme /θ/, sometimes by the same scribe.