The difference between O and Significant other
When used as nouns, o means operator, whereas significant other means one's romantic partner, regardless of marital status or gender.
O is also interjection with the meaning: the english vocative particle, used before a pronoun or the name of a person or persons to mark direct address.
O is also adjective with the meaning: over.
check bellow for the other definitions of O and Significant other
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O as a noun:
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O as a noun:
A zero .
Examples:
"It is currently two-o-five in the afternoon (2:05 PM)."
"The first permanent English settlement in America was in Jamestown in sixteen-o-seven (1607)."
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O as a noun (IRC):
Operator
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O as a noun:
Object, see SVO
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O as an adjective:
Over
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O as a preposition:
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Significant other as a noun:
One's romantic partner, regardless of marital status or gender.
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Significant other as a noun:
A person with whom one has an important bond of some kind.