A curb (American English) or kerb (British English) is the edge where a raised sidewalk or central median meets a street or other roadway. Curb is the 1 taxi app in the US that connects you to fast, convenient and safe rides across the US. Download Curb for iPhone or Android to easily request and pay for rides with the tap of a button. Curb is the 1 taxi app in the US that connects you to fast, convenient and safe rides across the US. Download Curb for iPhone or Android to easily request and pay for rides with the tap of a button. The CURB-65 Severity Score estimates mortality of community-acquired pneumonia to help determine inpatient vs. outpatient treatment. Welcome, let's ride! Please enter your phone number to get started! CURB definition: 1. to control or limit something that is not wanted: 2. a limit on something that is not wanted…. Learn more. restrain, check, curb, bridle mean to hold back from or control in doing something. restrain suggests holding back by force or persuasion from acting or from going to extremes. CURB definition: Also kerb a rim, especially of joined stones or concrete, along a street or roadway, forming an edge for a sidewalk. See examples of curb used in a sentence. When you're using the word curb as a noun, it's the raised edging beside a street. When curb is a verb, it means to restrain or hold back, like when you curb your impulse to laugh while watching a badly acted play. 1. a rim, esp. of joined stones or concrete, along a street or roadway, forming an edge for a sidewalk.