Hi jadezal,

Are you sure there was not two Rs in the word? In French we mainly use the word charrette to describe a two-wheeled cart used to transport heavy loads, but it can also mean a work spurt (like overtime) that you do to complete a project on time. In the second context it is used mainly in the architectural and communications fields.

Read the paragraphs around the sentence you submitted to see if the second meaning applies.