Definition of "clammed" [clammed]

• Simple past tense and past participle of clam. (verb)

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• "GRIFFIN (on camera): They made that promise before they got in power; then once in power, it all kind of clammed up, Anderson, and they kind of changed the definition of what "open" was going to mean."
• "Then, once in power, it all kind of clammed up, Anderson, and they kind of changed the definition of what open was going to mean."
• "Sensitive that I might be overstaying my welcome, I thanked him and he immediately kind of clammed up and readied himself to go."