宪法或基本法中的刚性条款(英语:entrenched clause, entrenchment clause)是让某些修正案更难以通过或无法通过的规定,导致此类修正案不予受理。刚性条款的修正或废除可能需要超级多数决、公投或少数政党的同意。刚性条款或相似用语出现在巴西、捷克[1]、德国、希腊[2]、印度[3]、伊朗、意大利[4]、摩洛哥[5]、挪威[4]与土耳其的宪法或基本法中。
The official English language translation of the Greek Constitution as of May 27, 2008 (页面存档备份,存于互联网档案馆), Article 110 §1, p. 124, source: Hellenic Parliament, "The provisions of the Constitution shall be subject to revision with the exception of those which determine the form of government as a Parliamentary Republic and those of articles 2 paragraph 1, 4 paragraphs 1, 4 and 7 , 5 paragraphs 1 and 3, 13 paragraph 1, and 26."