There are 2 definitions of om in English:

om1

Syllabification: om

noun

Hinduism& Tibetan Buddhism
A mystic syllable, considered the most sacred mantra. It appears at the beginning and end of most Sanskrit recitations, prayers, and texts.
More example sentences
  • Although Om symbolizes the most profound concepts of Hindu belief, it is in use daily.
  • Having seen some discussions here and in some other BBs I realize that Om has a very important and beautiful significance.

Origin

Sanskrit, sometimes regarded as three sounds, a-u-m, symbolic of the three major Hindu deities.

Definition of om in:

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Word of the day meretricious
Pronunciation: merəˈtriSHəs
adjective
apparently attractive but having in reality no value...

There are 2 definitions of om in English:

OM2

Syllabification: OM

abbreviation

(In the UK) Order of Merit.

Definition of om in: