suspension

Etymology

From Late Latin suspensiō, suspensiōnem (“arching, vaulting; suspension”), from suspendēre, from suspendō (“to hang up, to suspend”), from sub- (“prefix meaning ‘under’”) + pendere (from pendō (“to hang, to suspend”), from Proto-Italic *pendō (“to hang, to put in a hanging position”), from Proto-Indo-European *(s)pénd-e-ti, from *(s)pend- (“to pull; to spin”)). Compare Anglo-Norman suspensiun, French suspension, Occitan suspensio.

noun

1. The act of suspending, or the state of being suspended.
   suspension from a hook
2. A temporary or conditional delay, interruption or discontinuation.
   Fear of dioxin emissions led to suspension of efforts to establish a waste-to-energy plant at the Brooklyn Navy yard. 1983 September, “Recycled Materials Program in Response to the Resource Conservation and Recovery Act”, in Harvey Yakowitz, editor, The National Bureau of Standards Office of Recycled Materials, 1976–1982 (NBS Special Publication; 662), Washington, D.C.: United States Government Printing Office, →OCLC, page 52
3. (chemistry, physics) The state of a solid or substance produced when its particles are mixed with, but not dissolved in, a fluid, and are capable of separation by straining.
   As the solids clump together, they get heavier causing them to fall out of suspension in the water. 8 August 2011, M. W. Hubbell, “Chemistry”, in The Fundamentals of Nuclear Power Generation: Questions and Answers, Bloomington, Ind.: AuthorHouse, page 216
4. Thus a kind of silt or sludge.
5. The act of keeping a person who is listening in doubt and expectation of what is to follow.
6. The temporary barring of a person from a workplace, society, etc. pending investigation into alleged misconduct.
7. (education) The process of barring a student from school grounds as a form of punishment (particularly out-of-school suspension).
   suspension from school as a disciplinary measure
   […] Donna Thomas, John Tiedeman, David Jones, and Richard Williams, all students in the Granville Junior-Senior High School, conceived a plan in November 1978 to produce a satirical publication addressed to the school community. […] [Assistant Principal Frederick] Reed summoned Tiedeman and discussed with him the “dangers” of publishing material that might offend or hurt others. Specifically, he told Tiedeman that a similar publication several years before had culminated in the suspension of the students involved. 1979, Irving R[obert] Kaufman, Chief Judge, United States Court of Appeals for the Second Circuit, “Thomas v. Board of Education”, in The Federal Reporter. Second Series. Cases Argued and Determined in the Circuit Courts of Appeals and District Courts of the United States and the Court of Appeals of the District of Columbia, with Key-number Annotations, volume 607, St. Paul, Minn.: West Publishing Company, →OCLC, page 1045; reprinted in Michael Imber; Tyll van Geel, “Student Freedom of Expression”, in Education Law, 4th edition, New York, N.Y.; Abingdon, Oxon.: Routledge, 2010, page 158
8. (music) The act of or discord produced by prolonging one or more tones of a chord into the chord which follows, thus producing a momentary discord, suspending the concord which the ear expects.
   As in Sequenza IV, the suspension of the chord creates several different layers of activity, which can be understood by looking at the right hand’s chord in bar two. 2007, Zoe Browder Doll, “Phantom Rhythms, Hidden Harmonies: The Use of the Sostenuto Pedal in Berio’s Sequenza IV for Piano, Leaf and Sonata”, in Janet K. Halfyard, editor, Berio's Sequenzas: Essays on Performance, Composition and Analysis, Aldershot, Hampshire, Burlington, Vt.: Ashgate Publishing, page 62
9. (Scotland, law) A stay or postponement of the execution of a sentence, usually by letters of suspension granted on application to the Lord Ordinary.
10. (topology) A topological space derived from another by taking the product of the original space with an interval and collapsing each end of the product to a point.
    To get an intuitive feeling for the characteristics of H'-spaces, it is instructive to consider an important class of such spaces, the suspensions. The suspension of an arbitrary topological space Y is defined to be the quotient space of Y×I where Y×0 is identified to one point and Y×1 is identified to another point. For example, the suspension of a circle is a cylinder with the two ends collapsed into one point each; in other words, a space homeomorphic to a sphere. 2012, H. Rasmussen, “Strategy-proofness of Continuous Aggregation Maps”, in Geoffrey M. Heal, editor, Topological Social Choice: With 45 Figures (Social Choice and Welfare; vol. 14, no. 2, 1997), Berlin: Springer-Verlag, →DOI, page 110
11. (topology) A function derived, in a standard way, from another, such that the instant function’s domain and codomain are suspensions of the original function’s.
    A model category is called pointed if the initial object and terminal object are the same. The homotopy category of any pointed model category acquires a suspension functor denoted by Σ. It turns out that Ho(M) is a pre-triangulated category in a natural way[…]. When the suspension is an equivalence, M is called a stable model category, and in this case Ho(M) becomes a triangulated category[…]. 2010, Paul Arne Østvær, “Preliminaries”, in Homotopy Theory of C*-Algebras (Frontiers in Mathematics), Basel: Birkhäuser, Springer Basel, →DOI, page 17
12. (vehicles) The system of springs and shock absorbers connected to the wheels in an automobile, which allows the vehicle to move smoothly with reduced shock to its occupants.
    If you drive over a speed bump, the left and right tires push the suspension upward at the same time. 2011, Chuck Edmondson, “Steering and Suspension”, in Fast Car Physics, Baltimore, Md.: The Johns Hopkins University Press, page 151