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verb (used with object)
1.
to free from or as if from chains; set free.
noun
1.
a series of objects connected one after the other, usually in the form of a series of metal rings passing through one another, used either for various purposes requiring a flexible tie with high tensile strength, as for hauling, supporting, or confining, or in various ornamental and decorative forms.
2.
Often, chains. something that binds or restrains; bond:
the chain of timidity; the chains of loyalty.
3.
chains.

shackles or fetters:
to place a prisoner in chains.
bondage; servitude:
to live one’s life in chains.
Nautical. (in a sailing vessel) the area outboard at the foot of the shrouds of a mast: the customary position of the leadsman in taking soundings.
tire chain.

4.
a series of things connected or following in succession:
a chain of events.
5.
a range of mountains.
6.
a number of similar establishments, as banks, theaters, or hotels, under one ownership or management.
7.
Chemistry. two or more atoms of the same element, usually carbon, attached as in a chain.
Compare ring1 (def 17).
8.
Surveying, Civil Engineering.

a distance-measuring device consisting of a chain of 100 links of equal length, having a total length either of 66 feet (20 meters) (Gunter’s chain or surveyor’s chain) or of 100 feet (30 meters) (engineer’s chain)
a unit of length equal to either of these.
a graduated steel tape used for distance measurements.
Abbreviation: ch.

9.
Mathematics. totally ordered set.
10.
Football. a chain 10 yards (9 meters) in length for determining whether a first down has been earned.
verb (used with object)
11.
to fasten or secure with a chain:
to chain a dog to a post.
12.
to confine or restrain:
His work chained him to his desk.
13.
Surveying. to measure (a distance on the ground) with a chain or tape.
14.
Computers. to link (related items, as records in a file or portions of a program) together, especially so that items can be run in sequence.
15.
to make (a chain stitch or series of chain stitches), as in crocheting.
verb (used without object)
16.
to form or make a chain.
Idioms
17.
drag the chain, Australian Slang. to lag behind or shirk one’s fair share of work.
18.
in the chains, Nautical. standing outboard on the channels or in some similar place to heave the lead to take soundings.
noun
1.
a flexible length of metal links, used for confining, connecting, pulling, etc, or in jewellery
2.
(usually pl) anything that confines, fetters, or restrains: the chains of poverty
3.
(usually pl) Also called snow chains. a set of metal links that fit over the tyre of a motor vehicle to increase traction and reduce skidding on an icy surface
4.

a number of establishments such as hotels, shops, etc, having the same owner or management
(as modifier): a chain store

5.
a series of related or connected facts, events, etc
6.
a series of deals in which each depends on a purchaser selling before being able to buy
7.
(of reasoning) a sequence of arguments each of which takes the conclusion of the preceding as a premise See (as an example) sorites
8.
Also called Gunter’s chain. a unit of length equal to 22 yards
9.
Also called engineer’s chain. a unit of length equal to 100 feet
10.
(chem) two or more atoms or groups bonded together so that the configuration of the resulting molecule, ion, or radical resembles a chain See also open chain, ring1 (sense 18)
11.
(geography) a series of natural features, esp approximately parallel mountain ranges
12.
(Austral & NZ, informal) off the chain, free from responsibility
13.
(informal) jerk someone’s chain, yank someone’s chain, to tease, mislead, or harass someone
verb
14.
(surveying) to measure with a chain or tape
15.
(transitive) often foll by up. to confine, tie, or make fast with or as if with a chain
16.
to sew using chain stitch
noun
1.
Sir Ernst Boris. 1906–79, British biochemist, born in Germany: purified and adapted penicillin for clinical use; with Fleming and Florey shared the Nobel prize for physiology or medicine 1945
verb (transitive)
1.
to remove a chain or chains from
2.
to set at liberty; make free

chain (chān)
n.

A group of atoms covalently bonded in a spatial configuration like links in a chain.

A linear arrangement of living things such as cells or bacteria.

Chain (chān), Ernst Boris. 1906-1979.

German-born British biochemist. He shared a 1945 Nobel Prize for isolating and purifying penicillin, discovered in 1928 by Sir Alexander Fleming.
chain
(chān)
A group of atoms, often of the same element, bound together in a line, branched line, or ring to form a molecule. ◇ In a straight chain, each of the constituent atoms is attached to other single atoms, not to groups of atoms. ◇ In a branched chain, side groups are attached to the chain. ◇ In a closed chain, the atoms are arranged in the shape of a ring.
chain

(1.) A part of the insignia of office. A chain of gold was placed about Joseph’s neck (Gen. 41:42); and one was promised to Daniel (5:7). It is used as a symbol of sovereignty (Ezek. 16:11). The breast-plate of the high-priest was fastened to the ephod by golden chains (Ex. 39:17, 21). (2.) It was used as an ornament (Prov. 1:9; Cant. 1:10). The Midianites adorned the necks of their camels with chains (Judg. 8:21, 26). (3.) Chains were also used as fetters wherewith prisoners were bound (Judg. 16:21; 2 Sam. 3:34; 2 Kings 25:7; Jer. 39:7). Paul was in this manner bound to a Roman soldier (Acts 28:20; Eph. 6:20; 2 Tim. 1:16). Sometimes, for the sake of greater security, the prisoner was attached by two chains to two soldiers, as in the case of Peter (Acts 12:6).