noun, noun which may take the genitive case particle 'no', na-adjective
deep emotion; overwhelming emotion
A yojijukugo expressing a state of being deeply moved or filled with profound emotion, often used in formal or literary contexts.
After years of effort have borne fruit, I am filled with deep emotion.
彼は感慨無量の面持ちで卒業証書を受け取った。
He received his diploma with an expression of profound emotion.
Seeing my old teacher's face at the graduation ceremony, I was overwhelmed with emotion.
He gazed at the old photographs with a look of deep emotion.
感動 is the general, everyday term for being moved emotionally by something, while 感慨無量 specifically conveys an overwhelming, often nostalgic depth of feeling and sounds more formal.