Topic vs. Heading

Topic and Heading Definitions
Topic
The subject of a speech, essay, thesis, or discourse.
Heading
The title, subtitle, or topic that stands at the top or beginning, as of a paragraph, letter, or chapter.
Topic
A subject of discussion or conversation.
Heading
The course or direction in which a ship or aircraft is pointing or moving.
Topic
A subdivision of a theme, thesis, or outline.
Heading
A gallery or drift in a mine.
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Topic
(Linguistics) A word or phrase in a sentence, usually providing information from previous discourse or shared knowledge, that the rest of the sentence elaborates or comments on. Also called theme.
Heading
The end of a gallery or drift.
Topic
Topical
Heading
Present participle of head
Topic
Subject; theme; a category or general area of interest.
A society where a topic cannot be discussed, does not have free speech.
Stick to the topic
An interesting topic of conversation
Romance is a topic that frequently comes up in conversation
Heading
The title or topic of a document, article, chapter, or of a section thereof.
Put the information under the "Advantages" heading
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Topic
(Internet) Discussion thread.
Heading
(nautical) The direction into which a seagoing or airborne vessel's bow is pointing (apparent heading) and/or the direction into which it is actually moving relative to the ground (true heading)
Topic
(music) A musical sign intended to suggest a particular style or genre.
Heading
Material for the heads of casks, barrels, etc.
Topic
(obsolete) An argument or reason.
Heading
(mining) A gallery, drift, or adit in a mine; also, the end of a drift or gallery; the vein above a drift.
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Topic
An external local application or remedy, such as a plaster, a blister, etc.
Heading
(sewing) The extension of a line ruffling above the line of stitch.
Topic
One of the various general forms of argument employed in probable as distinguished from demonstrative reasoning, - denominated by Aristotle to`poi (literally, places), as being the places or sources from which arguments may be derived, or to which they may be referred; also, a prepared form of argument, applicable to a great variety of cases, with a supply of which the ancient rhetoricians and orators provided themselves; a commonplace of argument or oratory.
These topics, or loci, were no other than general ideas applicable to a great many different subjects, which the orator was directed to consult.
In this question by [reason] I do not mean a distinct topic, but a transcendent that runs through all topics.
Heading
(masonry) The end of a stone or brick which is presented outward.
Topic
An argument or reason.
Contumacious persons, who are not to be fixed by any principles, whom no topics can work upon.
Heading
(flags) A strip of material at the hoist end of a flag, used for attaching the flag to its halyard.
Topic
The subject of any distinct portion of a discourse, or argument, or literary composition; also, the general or main subject of the whole; a matter treated of; a subject, as of conversation or of thought; a matter; a point; a head.
Heading
The act or state of one who, or that which, heads; formation of a head.
Topic
An external local application or remedy, as a plaster, a blister, etc.
Heading
That which stands at the head; title; as, the heading of a paper.
Topic
Topical.
Heading
Material for the heads of casks, barrels, etc.
Topic
The subject matter of a conversation or discussion;
He didn't want to discuss that subject
It was a very sensitive topic
His letters were always on the theme of love
Heading
A gallery, drift, or adit in a mine; the vein above a drift.
Topic
Some situation or event that is thought about;
He kept drifting off the topic
He had been thinking about the subject for several years
It is a matter for the police
Heading
The extension of a line ruffling above the line of stitch.
Heading
That end of a stone or brick which is presented outward.
Heading
A line of text serving to indicate what the passage below it is about;
The heading seemed to have little to do with the text
Heading
The direction or path along which something moves or along which it lies
Heading
A horizontal (or nearly horizontal) passageway in a mine;
They dug a drift parallel with the vein