constitutionalism

UK: /ˌkɒnstɪˈtjuːʃənəˌlɪzəm/

US: (kon′sti to̅o̅′shə nl iz′əm, -tyo̅o̅′-)

WordReference Random House Unabridged Dictionary of American English © 2025

con•sti•tu•tion•al•ism  (kon′sti to̅o̅′shə nl iz′əm, -tyo̅o̅′-), n. 

1. Government the principles of constitutional government or adherence to them.
2. Government constitutional rule or authority.

• constitutional + -ism 1825–35

Collins Concise English Dictionary © HarperCollins Publishers::

constitutionalism / ˌkɒnstɪˈtjuːʃənəˌlɪzəm/ noun

1. the principles, spirit, or system of government in accord with a constitution, esp a written constitution
2. adherence to or advocacy of such a system or such principles

ˌconstiˈtutionalist noun