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1. Not flexible or pliant; stiff: a rigid material. See Synonyms at stiff.
2. Not moving or flexing: rigid muscles.
3. Not changing or adjusting to different conditions or problems: a rigid thinker; a rigid hierarchy.
4. Scrupulously or severely maintained or performed; rigorous or harsh: rigid discipline.
5. Being an airship with a external frame made of rigid parts.

[Middle English rigide, from Latin rigidus, from rigēre, to be stiff; see reig- in Indo-European roots.]

rig′id·ly adv.
rig′id·ness n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.rigidness - the physical property of being stiff and resisting bending
inelasticity - the lack of elasticity
inflexibility, inflexibleness - a lack of physical flexibility
2.rigidness - the quality of being rigid and rigorously severe
unadaptability - the inability to change or be changed to fit changed circumstances
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.


The American Heritage® Roget's Thesaurus. Copyright © 2013, 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(ˈridʒid) adjective
1. completely stiff; not able to be bent (easily). An iron bar is rigid.
2. very strict, and not likely to change. rigid rules; rigid discipline; rigid views on education; a stern, rigid headmaster.
ˈrigidly adverb
ˈrigidness, riˈgidity noun
Kernerman English Multilingual Dictionary © 2006-2013 K Dictionaries Ltd.
References in periodicals archive ?
The hydroxy apatite provides rigidness to bone and its structure which together with the protein content provides thermal stability to bone overall structure.
Like the rigidness of her self-portraits, Matthiasdottir worked to fix her world in paint, and that was her point.
(Stigler, 1987, 77) Economic terms seem to pass in their historical development through a series of stages which, without pretension to rigidness, may be described as follows: first, no definition is given, but it is assumed that every one has a sufficiently clear idea of the subject to make a formal definition unnecessary; second, a definition is attempted and a number of exceptional forms are noted; third, with the further increase of data, the relative importance of the various forms changes, confusion in discussion is introduced, logomachy takes the place of constructive investigation; fourth, a complete classification of the forms embraced under the original term is made, and problems are investigated with reference to these classes.
Although it regains its rigidness when the temperature descends below this range, a greater degree of warpage has been introduced.
Mehmet Demirkol of the Milliyet newspaper slammed the rigidness of Eriksson's tactics, mocking: "We don't know if we will play 3-5-2 or 4-4-2 and, more importantly, we don't care.
But unlike the professional ballet companies they strive to join, they try to get away from the rigidness of classical dance.
At the bottom of the pyramid, I deleted personality attributes that the students might not understand, such as androgyny, which Piirto said means flexibility and lack of rigidness in sex role stereotyping.
Rigidness is manifested by an unwillingness to change, adapt, or embrace flexibility.
The cholo looks at the deputy's pocket and a rigidness descends on his face like a thin sheet of ice.
Therefore, the biggest challenge to China's search for major power status may not be the current backwardness of its technology but the rigidness of its process of governance.
ALTHOUGH much of the style of Johnson's Sermons closely resembles his most energetic writing in the Ramblers, there is a noteworthy lack of versatility and a structural rigidness in the conclusions of his Sermons.