1. Formation of a word by means of an affix
   "The affixation of 'un-' to 'happy' creates its antonym"
    
2. The result of adding an affix to a root word
   "The affixation of 'un-' to 'happy' creates the word 'unhappy'"
    
3. The act of attaching or affixing something
   "The affixation of stamps to envelopes is becoming less common in the digital age";
   - attachment

Derived forms: affixations

Type of: combination, combining, compounding, formation, morphology, sound structure, syllable structure, word structure

Encyclopedia: Affixation