prop

v. lean against -, place against -; hold up, support

n. support, rest; column, beam that is used as a support; item used during a performance, stage accessory

n. suggested plan, proposed scheme, suggested program; statement that can be considered as true or false (Logic); act of proposing, suggestion

Prop or props may be: One of several positions in rugby footballPropeller, a bladed propulsion deviceTheatrical property, a portable item used in performancesPropaganda, a type of message designed to influenceProposition, a question on a ballot or referendumSlang abbreviation for "proper recognition," or the fist pound hand gesture associated with this practiceAn abbreviation for the thionamide drug propylthiouracilSlang abbreviation for Proposition betProp (band), a nu-jazz band from Australia
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In category theory, a PRO is a strict monoidal category whose objects are the natural integers and whose tensor product is given on objects by the addition on integers. By an integer , we mean here the set .Some examples of PROs:the discrete category of integers,the category FinSet of integers and functions between them,the category Bij of integers and bijections,the category Inj of integers and injections,the simplicial category  of integers and monotonic functions.PROBs (resp. PROPs) are defined similarly with the additional requirement for the category to be braided (resp. to have a symmetry).
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Noun
1. a support placed beneath or against something to keep it from shaking or falling
(hypernym) support
(hyponym) pitprop, sprag
(derivation) prop up, shore up, shore
2. any movable articles or objects used on the set of a play or movie; "before every scene he ran down his checklist of props"
(synonym) property
(hypernym) object, physical object
(hyponym) custard pie
(part-holonym) mise en scene, stage setting, setting
3. a propeller that rotates to push against air
(synonym) airplane propeller, airscrew
(hypernym) propeller, propellor
(part-holonym) propeller plane
Verb
1. support by placing against something solid or rigid; "shore and buttress an old building"
(synonym) prop up, shore up, shore
(hypernym) hold, support, sustain, hold up
(hyponym) bolster

n. stopper, wad, gag, plug, tampion, lump, obturator, clod, chunk, half pint

(v.)
That which sustains an incumbent weight; that on which anything rests or leans for support; a support; a stay; as, a prop for a building.
  

(v. t.)
To support, or prevent from falling, by placing something under or against; as, to prop up a fence or an old building; (Fig.) to sustain; to maintain; as, to prop a declining state.
  

(n.)
A shell, used as a die. See Props.