1. a quantity having both magnitude and direction, represented by an arrow
Usage: mathematics; physics
2. an organism that transmits disease or parasites from one host to another
Usage: biology; medicine
3. a course or direction of an aircraft
Usage: aviation

Examples

• The physics teacher drew a vector on the board to show force and direction.
• Velocity is a vector quantity because it has both speed and direction.
• Mosquitoes are vectors that can transmit malaria to humans.
• The tick served as a vector for Lyme disease.
• Air traffic control gave the pilot a new vector to avoid the storm.
• The aircraft changed its vector to approach the runway from the east.