The kanji 盛 generally conveys the idea of "flourishing," "thriving," "prosperous," "abundant," or "full." It can refer to things that are abundant, lively, or in a state of growth and prosperity. It often implies a peak or a moment of fullness. It can also imply to "fill" or "heap".

・On-yomi (音読み): せい (sei) ・Kun-yomi (訓読み): さか(ん) (saka(n)), も(る) (mo(ru))

⚫︎ 盛大なパーティー Translation: A grand party ⚫︎ 盛んに議論する Translation: To debate vigorously ⚫︎ ご飯を盛る Translation: To serve rice

The kanji 盛 is a phono-semantic compound (形声文字, keisei moji). The phonetic component is the character 成 (sei), which provides the sound. The semantic component is 皿 (sara), which depicts a plate. The combination of these components suggests something being filled and overflowing. The top part represents a plate, and the lower part indicates something thriving or flourishing, or it implies being successful. This composition gives the kanji its meaning of abundance, prosperity, or to fill.