not to say conjunction 1phrase 1 conjunction1 •Even; perhaps; almost.At first Marc was somewhat shocked, then he burst out laughing and finally came to the conclusion that actually it was all rather sad, not to say stupid. — 1962 phrase1 •Used to clarify a statement: not intended to mean.“Without an engaged audience, there’s no route to stardom.” ¶ That’s not to say that Sophie thinks the internet celebrity is dead. They may just have to work a little harder for it. — 2024