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3. be at a loss

be at a loss

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be at a loss

To be uncertain of how to proceed or what to do or think. Your behavior is absolutely unacceptable. I'm at a loss as to what to do with you. Now that the whole schedule has been rearranged, I'm at a loss.

See also: loss

be at a loss

to not know what to do or say (usually + to do sth) He won't accept financial help from me so I'm at a loss to know what to do. For once I found myself completely at a loss for words. (= I did not know what to say)

See also: loss