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Definition of Fixed point
1. Noun. (mathematics) A value which is unchanged by a function or other mapping. Formally: a value ''x'' for which ''f''(''x'') = ''x''.W ¹
2. Noun. (computing) A fractional-number representation with a fixed number of digits after the decimal point. Compare floating point and integer. ¹
3. Adjective. (computing) Pertaining to fixed point representations or operations. ¹
¹ Source: wiktionary.com