Source:dota2.gamepedia.com/Teleport
Blink
 
  
General Blink icon.
 
 
A 
blink is usually an instantly cast ability which moves the 
controlled unit from one point to another at a short range. Blinks, 
unlike other displacement abilities like 
Leap or 
Force Staff, disjoint any projectile (with the exception of 
Death Pulse) targeted on the blinking unit. (
Gyrocopter's  
Homing Missile is a unit and cannot be disjointed.) 
  True Blink 
True blinks have very specific parameters that are shared with all 
other true blinks: they are point-targeted and do not incorporate any 
sort of "travel time," although 
Teleportation has a three-second delay. True blinks are disabled while a unit is 
ensnared or 
entangled.