The difference between Subject and Topic
When used as nouns, subject means in a clause: the word or word group (usually a noun phrase) that is dealt with. in active clauses with verbs denoting an action, the subject and the actor are usually the same, whereas topic means subject.
When used as adjectives, subject means likely to be affected by or to experience something, whereas topic means topical.
Subject is also verb with the meaning: to cause (someone or something) to undergo a particular experience, especially one that is unpleasant or unwanted.
check bellow for the other definitions of Subject and Topic
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Subject as an adjective:
Likely to be affected by or to experience something.
Examples:
"a country subject to extreme heat"
"Menu listings and prices are subject to change."
"He's subject to sneezing fits."
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Subject as an adjective:
Conditional upon.
Examples:
"The local board sets local policy, subject to approval from the State Board."
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Subject as an adjective:
Placed or situated under; lying below, or in a lower situation.
Examples:
"rfquotek Spenser"
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Subject as an adjective:
Placed under the power of another; owing allegiance to a particular sovereign or state.
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Subject as a noun (grammar):
In a clause: the word or word group (usually a noun phrase) that is dealt with. In active clauses with verbs denoting an action, the subject and the actor are usually the same.
Examples:
"In the sentence ‘The mouse is eaten by the cat in the kitchen.’, ‘The mouse’ is the subject, ‘the cat’ being the agent."
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Subject as a noun:
An actor; one who takes action.
Examples:
"The subjects and objects of power."
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Subject as a noun:
The main topic of a paper, work of art, discussion, field of study, etc.
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Subject as a noun:
A particular area of study.
Examples:
"Her favorite subject is physics."
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Subject as a noun:
A citizen in a monarchy.
Examples:
"I am a British subject."
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Subject as a noun:
A person ruled over by another, especially a monarch or state authority.
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Subject as a noun (music):
The main theme or melody, especially in a fugue.
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Subject as a noun:
A human, animal or an inanimate object that is being examined, treated, analysed, etc.
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Subject as a noun (philosophy):
A being that has subjective experiences, subjective consciousness, or a relationship with another entity.
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Subject as a noun (logic):
That of which something is stated.
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Subject as a noun (math):
The variable in terms of which an expression is defined.
Examples:
"Making ''x'' the subject of ''x''sup 2 − 6''x'' + 3''y'' = 0, we have ''x'' = 3 ± √(9 − 3''y'')."
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Subject as a verb (transitive, construed with '''to'''):
To cause (someone or something) to undergo a particular experience, especially one that is unpleasant or unwanted.
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Topic as an adjective:
Topical.
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Topic as a noun:
Subject; theme; a category or general area of interest.
Examples:
"A society where a topic cannot be discussed, does not have free speech."
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Topic as a noun (Internet):
Discussion thread.
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Topic as a noun (obsolete):
An argument or reason.
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Topic as a noun (obsolete, medicine):
An external local application or remedy, such as a plaster, a blister, etc.
Examples:
"rfquotek Wiseman"