noun
the said person; the same person; he/she
Formal, written-style noun used in news reports and official documents to refer back to a previously mentioned person without repeating their name. Gender-neutral; context determines whether it translates as 'he' or 'she'.
同氏は記者会見で新方針を発表した。
The said person announced the new policy at the press conference.
noun
same surname
Rare, literal reading of the kanji; almost never used in modern Japanese outside of metalinguistic explanations or wordplay.
「同氏」を文字通りに解釈すると「同じ氏」という意味になるが、現代語ではまず使われない。
Taken literally, 同氏 means 'same surname', but it is almost never used that way in modern Japanese.
Compound of 同 (same) and 氏 (honorific suffix for a person, originally meaning 'clan' or 'family name'). The modern sense 'the said person' developed from formal written conventions.