Generally, practices or patterns of behavior regularly performed in a set, precise manner, for either personal or public purposes. Specifically, particular activities performed during a designated event, often a ceremony.

rituals(events)　(P,,U,English-P,D,U,U)
ritual(event)　(,U,English-NP,AD,U,U)
ritual(evento)　(,U,Spanish-NP,AD,U,U)
rituelen(gebeurtenissen)　(P,,U,Dutch-P,D,U,U)
ritueel(gebeurtenis)　(,U,Dutch-NP,AD,U,U)
rituales(eventos)　(P,,U,Spanish-P,D,U,PN)
儀式(事件)　(P,,U,Chinese (traditional)-P,D,U,U)
i shih (P,,U,Chinese (transliterated Wade-Giles)-P,UF,U,U)
yí shì (P,,U,Chinese (transliterated Hanyu Pinyin)-P,UF,U,U)
yi shi (P,,U,Chinese (transliterated Pinyin without tones)-P,UF,U,U)

Top of the AAT hierarchies
....Activities Facet
........Events
............events
................rituals (events)

meaning/usage overlaps with....	ceremonies
meaning/usage overlaps with....	rites

Dutch....	Gebruiken of gedragspatronen die regelmatig op een vaste, nauwkeurige manier worden uitgevoerd voor persoonlijke of openbare doeleinden.
Spanish....	Práctica de patrones de comportamiento regularmente llevados a cabo de un modo fijo y preciso, para fines tanto personales como públicos.
Chinese (traditional)....	不論個人或公眾目的，有規律地以整套、精準的方式表現之慣例或行為模式。

rituals(events)............	[VP]
.................	Thesaurus of Sociological Indexing Terms (1986) rituals
.................	UNESCO Thesaurus (1977) rituals
.................	Webster's Third New International Dictionary (1961) rituals
.................	Random House Dictionary of the English Language (1987) rituals
.................	Getty Vocabulary Program rules
ritual(event)............	[VP]
.................	CDMARC Subjects: LCSH (1988-) ritual
.................	RILA, Subject Headings (1975-1990) ritual
.................	Getty Vocabulary Program rules
.................	Moliner, Diccionario de uso del español (2004) I:1046
rituelen(gebeurtenissen)............	[Bureau AAT]
.................	AAT-Ned (1994-)
ritueel(gebeurtenis)............	[Bureau AAT]
.................	AAT-Ned (1994-)
rituales(eventos)............	[VP]
.................	TAA database (2000-)
儀式(事件)............	[AS-Academia Sinica]
.................	朗文當代大辭典 p.1504
.................	國家教育研究院－雙語詞彙、學術名詞暨辭書資訊網 August 28, 2009
.................	牛津當代大辭典 p.1588
.................	歡迎光臨人類學 p.237
.................	當代文化人類學 p.850
Subject:............	[Bureau AAT]
.................	RILA, Subject Headings (1975-1990) precoor.; Jewish ritual; rites and ceremonies; Liturgy and ritual; Byzantine liturgy and ritual
.................	Bureau AAT, RKD

Getty AAT: 300065284 Getty AAT: http://www.getty.edu/vow/AATFullDisplay?find=costume&logic=AND¬e=&subjectid=300065284
ASDC Union Catalog： rituals 、ritual 、rituelen 、ritueel 、ritual 、rituales 、儀式 、i shih 、yí shì 、yi shi