browse words by letter
a
b
c
d
e
f
g
h
i
j
k
l
m
n
o
p
q
r
s
t
u
v
w
x
y
z
more about closure
closure |
3 definitions found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Closure \Clo"sure\ (?, 135), n. [Of. closure, L. clausura, fr clauedere to shut. See {Close}, v. t.] 1. The act of shutting; a closing; as the closure of a chink. 2. That which closes or shuts; that by which separate parts are fastened or closed. Without a seal, wafer, or any closure whatever. --Pope. 3. That which incloses or confines; an inclosure. O thou bloody prison . . . Within the guilty closure of thy walls Richard the Second here was hacked to death. --Shak. 4. A conclusion; an end [Obs.] --Shak. 5. (Parliamentary Practice) A method of putting an end to debate and securing an immediate vote upon a measure before a legislative body. It is similar in effect to the previous question. It was first introduced into the British House of Commons in 1882. The French word {cl[^o]ture} was originally applied to this proceeding. From WordNet r 1.6 [wn]: closure n 1: approaching a particular destination; a coming closer; a narrowing of a gap; "the ship's rapid rate of closing gave them little time to avoid a collision" [syn: {closing}] 2: a rule for ending debate in a deliberative body [syn: {cloture}, {gag rule}] 3: an obstruction in a pipe or tube; "we had to call a plumber to clear out the blockage in the drainpipe" [syn: {blockage}, {block}, {occlusion}, {stop}, {stoppage}] 4: the act of blocking [syn: {blockage}, {occlusion}] 5: termination of operations [syn: {closedown}, {closing}, {shutdown}] v : terminate and take a vote; "Closure a debate" [syn: {cloture}] From The Free On-line Dictionary of Computing (13 Mar 01) [foldoc]: closure 1.In a {reduction system}, a closure is a data structure that holds an expression and an environment of variable bindings in which that expression is to be evaluated. The variables may be local or global. Closures are used to represent unevaluated expressions when implementing {functional programming languages} with {lazy evaluation}. In a real implementation, both expression and environment are represented by pointers. A {suspension} is a closure which includes a flag to say whether or not it has been evaluated. The term "{thunk}" has come to be synonymous with closure" but originated outside {functional programming}. 2. In {domain theory}, given a {partially ordered set}, D and a subset, X of D, the upward closure of X in D is the union over all x in X of the sets of all d in D such that x <= d. Thus the upward closure of X in D contains the elements of X and any greater element of D. A set is "upward closed" if it is the same as its upward closure, i.e. any d greater than an element is also an element. The downward closure (or "left closure") is similar but with d <= x. A downward closed set is one for which any d less than an element is also an element. ("<=" is written in {LaTeX} as {\subseteq} and the upward closure of X in D is written \uparrow_\{D} X). (1994-12-16)
more about closure
This work is licensed under a
