Definite grammatical article that implies necessarily that an entity it hints at is presupposed; something already mentioned, or completely specified later in that same sentence, or assumed already completely specified.

Used before a noun modified by a restrictive relative clause, indicating that the noun refers to a single referent defined by the relative clause.

Used before an object considered to be unique, or of which there is only one at a time.

Used before a superlative or an ordinal number modifying a noun, to indicate that the noun refers to a single item.

Added to a superlative or an ordinal number to make it into a substantive.

Introducing a singular term to be taken generically: preceding a name of something standing for a whole class.

Used before an adjective, indicating all things (especially persons) described by that adjective.

Used to indicate a certain example of (a noun) which is usually of most concern or most common or familiar.

Used before a body part (especially of someone previously mentioned), as an alternative to a possessive pronoun.

When stressed, indicates that it describes an object which is considered to be best or exclusively worthy of attention.

For each; per.

With a comparative or with more and a verb phrase, establishes a correlation with one or more other such comparatives.

With a comparative, and often with for it, indicates a result more like said comparative. This can be negated with none.