1. When a continuous signal sampled at discrete points cannot be reconstructed unambiguously due to insufficient information; artifacts introduced by insufficient sampling, for example when diagonal lines and curves in a digital image become distorted due to low resolution
   "The low-resolution image suffered from aliasing, making the edges appear jagged"

1. [technical] Have a signal at frequency appear as a different frequency due to inadequate sampling
   "The engineer had to be careful not to alias the high-frequency components"
    
2. (computing) give an additional equivalent name to an entity, for example one that's more user-friendly
   "We can alias the long command to make it easier to use"

Derived forms: aliasings

Encyclopedia: Aliasing