It's denoted by a 1

• #1 on a lane
• One easily bowled over?
• Lane's number one
• First thing usually hit by a bowling ball
• It's placed midway between the gutters
• The front bowling pin in the triangular arrangement of ten pins
• First of an alley's 10
• It's closest to the foul line

WordNet Word definitions in WordNet
n. the front bowling pin in the triangular arrangement of ten pins [syn: kingpin ]