have/keep one's guard up

idiom

: to be careful and alert
He always has/keeps his guard up during negotiations.

Dictionary Entries Near have/keep one's guard up

Cite this Entry

“Have/keep one's guard up.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/have%2Fkeep%20one%27s%20guard%20up. Accessed 24 Jun. 2024.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!