A subject that is not explicitly stated in a sentence but is understood from context; common in Japanese where subjects are often omitted.
日本語では「行く」とだけ言っても、暗黙の主語があって意味が通じることが多い。
In Japanese, just saying 'I'll go' (行く) is often understood because an implicit subject is present in context.
英語は主語を明示するのが普通だが、日本語では暗黙の主語で済むことが多い。
English usually makes the subject explicit, but in Japanese an implicit subject often suffices.
会話では暗黙の主語を使うので、聞き手は文脈から誰のことか判断する必要がある。
Because conversations use implicit subjects, listeners need to infer who is being referred to from context.