The kanji 満 primarily conveys the concept of "full," "to be full," "to satisfy," or "complete." It implies a state of being filled to capacity, overflowing, or reaching a certain limit. It also extends to the idea of fulfillment, satisfaction, and the completion of a task or period.

・On-yomi (音読み): マン (man) ・Kun-yomi (訓読み): み（ちる） (michi(ru) - to be full, to be filled); み（たす） (mita(su) - to fill, to satisfy)

⚫︎満月 Translation: Full moon ⚫︎満足 Translation: Satisfaction; contentment ⚫︎満員電車 Translation: Crowded train

The kanji 満 is a 形声文字 (keisei moji), a phono-semantic compound character. The left side is the radical 氵 (san-zui, or "water") which indicates the semantic component, and suggests the meaning of the character has to do with liquids or fluids. The right side is 㒼 which acts as the phonetic component, indicating the pronunciation. The original meaning likely related to water filling up a container. Over time, the meaning expanded to encompass the idea of "fullness" and "completeness" in general.