(redirected from cleanable)
Also found in: Dictionary, Thesaurus, Medical, Legal, Financial, Idioms, Wikipedia.


a. (of a nuclear weapon) producing little or no radioactive fallout or contamination
b. uncontaminated
2. (of a wound, etc.) having no pus or other sign of infection
3. Aeronautics causing little turbulence; streamlined
4. (of an aircraft) having no projections, such as rockets, flaps, etc., into the airstream
5. Nautical of a vessel
a. having its bottom clean
b. having a satisfactory bill of health
6. Old Testament
a. (of persons) free from ceremonial defilement
b. (of animals, birds, and fish) lawful to eat
7. New Testament morally and spiritually pure


i. An aircraft that is not carrying external stores like drop tanks or armament.
ii. An aircraft in flight but with the undercarriage, flaps, and airbrakes retracted.


A lazy higher-order purely functional language from the University of Nijmegen. Clean was originally a subset of Lean, designed to be an experimental intermediate language and used to study the graph rewriting model. To help focus on the essential implementation issues it deliberately lacked all syntactic sugar, even infix expressions or complex lists,

As it was used more and more to construct all kinds of applications it was eventually turned into a general purpose functional programming language, first released in May 1995. The new language is strongly typed (Milner/Mycroft type system), provides modules and functional I/O (including a WIMP interface), and supports parallel processing and distributed processing on loosely coupled parallel architectures. Parallel execution was originally based on the PABC abstract machine.

It is one of the fastest implementations of functional languages available, partly aided by programmer annotations to influence evaluation order.

Although the two variants of Clean are rather different, the name Clean can be used to denote either of them. To distinguish, the old version can be referred to as Clean 0.8, and the new as Clean 1.0 or Concurrent Clean.

The current release of Clean (1.0) includes a compiler, producing code for the ABC abstract machine, a code generator, compiling the ABC code into either object-code or assembly language (depending on the platform), I/O libraries, a development environment (not all platforms), and documentation. It is supported (or will soon be supported) under Mac OS, Linux, OS/2, Windows 95, SunOS, and Solaris. E-mail: <>. Mailing list: <>.

["Clean - A Language for Functional Graph Rewriting", T. Brus et al, IR 95, U Nijmegen, Feb 1987].

["Concurrent Clean", M.C. van Eekelen et al, TR 89-18, U Nijmegen, Netherlands, 1989].



1. Used of hardware or software designs, implies "elegance in the small", that is, a design or implementation that may not hold any surprises but does things in a way that is reasonably intuitive and relatively easy to comprehend from the outside. The antonym is "grungy" or crufty.

2. To remove unneeded or undesired files in a effort to reduce clutter: "I'm cleaning up my account." "I cleaned up the garbage and now have 100 Meg free on that partition."
References in periodicals archive ?
Control boxes should have sloped, cleanable tops and any doors must be free of piano hinges.
Materials and surfaces were chosen to be clean and cleanable, yet also to be uniform and efficient.
Pulling dirty air through the inlet at the bottom of the unit, a 4" cleanable filter acts as the prefilter for light mist, a 1" deep aluminum mesh filter traps swarf, and a 95% high-loft, ultra-fine glass filter pack captures the remaining mist.
Filters, on the other hand, are consumables intended to be replaced on a regular basis, even though many have been designed to be cleanable, thereby extending their useable lifetimes.
They are said to be easily cleanable, versatile, compact, quiet and energy efficient, and offer automatic mixing and safety.
5 cents to 8 cents per square foot of cleanable space in Class A office buildings, depending on how close the property was to New York City, the number of private offices, the amount of space being cleaned, the number of employees in the building and whether or not union workers were involved.
Touchy Tags are made from soft, durable, cleanable, BPA- and phthalate-free PVC, fastened with color-coordinated ribbons featuring a sewn-on hook-and-loop closure.
Tenders are invited for Electric Insect Killer 18/20 W, 2 Ft Uv Tube Light 2 Ft, Wall And Desk Mounted, Easy Cleanable And Lamp Replacement, Large Effective Catch Area
The former three are also bleach cleanable for contract and hospitality interiors.
The unit is easily cleanable with round corners, no ledges and no hidden areas.
MINNEAPOLIS, June 28, 2013 /PRNewswire-iReach/ -- "In reviewing PPI's US Patent #8,439,204; it appears to be the most comprehensive patent to date for cartridge-style cleanable and reusable filtration devises.
They are also easily cleanable - a key consideration given the vital importance of hygiene in this sector.