intr.v. scrammed, scram·ming, scrams 1. To leave a scene at once; go abruptly. 2. To shut down automatically. Used of a nuclear reactor. n. A rapid shutting down of a nuclear reactor, especially in an emergency. [Perhaps short for SCRAMBLE.] |
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.