The is a grammatical article in English, denoting nouns that are already or about to be mentioned, under discussion, implied or otherwise presumed familiar to listeners, readers, or speakers. It is the definite article in English.

About is a preposition or an adverb. … The most common meaning of about as a preposition is ‘on the subject of’ or ‘connected with’: … We use about as an adverb when we talk about time, …

The meaning of ABOUT is reasonably close to. How to use about in a sentence.

About is a preposition or an adverb. The most common meaning of about as a preposition is ‘on the subject of’ or ‘connected with’: Do you know anything about cricket? I’m very worried about …

We use the definite article in front of a noun when we believe the listener/reader knows exactly what we are referring to: The Pope is visiting Russia. The moon is very bright tonight. Who is the president of France? This is why we use the definite article with a superlative adjective: He is the tallest boy in the class.

The adverb about, when used with a quantity, means approximately or roughly. If a teenager wants to have a couple of friends over, his mom might ask about how many "a couple" is — in his mind it may be about 50. The adverb about can also be used for things that are almost, or just on the verge of happening.

Definition of about preposition from the Oxford Advanced Learner's Dictionary. on the subject of somebody/something; in connection with somebody/something. Tell me all about it. What's she so angry about? There's something strange about him. …

language note: The is the definite article. It is used at the beginning of noun groups. The is usually pronounced (ðə ) before a consonant and (ði ) before a vowel, but pronounced (ði ) when you are emphasizing it. You use the at the beginning of noun groups to refer to someone or something that you have already mentioned or identified.

See examples of ABOUT used in a sentence.

The meaning of THE is —used as a function word to indicate that a following noun or noun equivalent is definite or has been previously specified by context or by circumstance. How to use the in a sentence.