Definition of 当て字 (あてじ)
あじ
                        当て字
あてじ
ateji
noun
1.
kanji used as a phonetic symbol, instead of for the meaning, phonetic-equivalent character, substitute character
2.
kanji used for their meaning, irrespective of reading
Other readings:
                あて字【あてじ】
、宛字【あてじ】
、宛て字【あてじ】
、当字【あてじ】[1]
                Notes:
                - irregular okurigana usage
Related Kanji
| 当 | hit, right, appropriate, himself | 
| 字 | character, letter, word, section of village | 
| 宛 | address, just like, fortunately |