nonfixed

Nonfixed, sometimes written non-fixed, is an English adjective formed from the prefix non- and fixed. It denotes that something is not fixed, whether because it is movable, adjustable, or its value or position can vary. In general writing, the term is relatively uncommon; phrases such as not fixed, variable, or adjustable are more commonly used.

In mathematics, the term relates to fixed points. A non-fixed point of a function f is an element x for which f(x) ≠ x. Fixed-point theory and the study of dynamical systems distinguish fixed points (where f(x) = x) from non-fixed points, which change under iteration.

In engineering and design, a non-fixed component or connection is not permanently attached. Non-fixed joints, mounts, or fasteners allow repositioning, alignment, or movement, as opposed to rigid, fixed connections.

In finance and contracting, non-fixed terms denote variability. Non-fixed interest rates or prices indicate they can change over time, with variable-rate arrangements or adjustable price schedules common in many contracts.

Usage notes: The hyphenated form non-fixed is common in technical writing; many writers prefer not-fixed or not fixed in general prose. When precision is required, specific terms such as fixed point, variable rate, or adjustable component are typically preferred.