Constitutional

That which is consistent with or dependent upon the fundamental law that defines and establishes government in society and basic principles to which society is to conform.

A law is constitutional when it does not violate any provision of the U.S. Constitution or any state constitution.

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CONSTITUTIONAL. That which is consonant to, and agrees with the constitution.
     2. When laws are made in violation of the constitution, they are null and void: but the courts will not declare such a law void unless there appears to be a clear and unequivocal breach of the constitution. 4 Dall. R. 14; 3 Dall. R. 399; 1 Cranch, R. 137; 1 Binn. R. 415 6 Cranch, R. 87, 136; 2 Hall's Law Journ. 96, 255, 262; 3 Hall's Law Journ. 267; Wheat. Dig. tit. Constitutional Law; 2 Pet. R. 522; 2 Dall. 309; 12 Wheat. R. 270; Charlt. R. 175,.235; 1 Breese, R. 70, 209; 1 Blackf. R. 206 2 Porter, R. 303; 5 Binn. 355; 3 S. & R. 169; 2 Penn. R. 184; 19 John. R. 58; 1 Cowen, R. 550; 1 Marsb. R. 290 Pr. Dec. 64, 89 2 Litt. R. 90; 4 Monr R. 43; 1 South. R. 192; 7 Pick. R. 466; 13 Pick. R. 60 11 Mass. R. 396; 9 Greenl. R. 60; 5 Hayw. R. 271; 1 Harr. & J. 236; 1 Gill & J. 473; 7 Gill & J. 7; 9 Yerg. 490; 1 Rep. Const. Ct. 267; 3 Desaus. R. 476; 6 Rand. 245; 1 Chip. R. 237, 257; 1 Aik. R. 314; 3 N. H. Rep. 473; 4 N. H. Rep. 16; 7 N. H. Rep. 65; 1 Murph. R. 58. See 8 Law Intell. 65, for a list of decisions made by the supreme court of the United States, declaring laws to be unconstitutional.