Object

An object is one half of the object/impression relationship that makes symbols.

They are a word or phrase in a text which conveys substantial an isolated literal meaning: that is, it is a word or phrase that by itself communicates to an audience something meaningful. Nouns and verbs are almost always objects since they by themselves communicate a thing or an action: and since most adjectives communicate traits about the nouns they modify and most adverbs communicate a fashion about the verb they modify: even without the thing they modify the word "blue" communicates blueness and the word "quickly" communicates 'quickly-ness', making adjectives and adverbs objects as well.

Pronouns, as substitutes for nouns, don't usually carry enough isolated meaning in isolation to be objects (the big exceptions are "you" and "we").

Some prepositions like "up" are also objects since they communicate a sense of 'up-ness,' but others like "of" don't communicate a sense of "of-ness." And lastly, articles and conjunctions do not in isolation convey enough literal meaning to be considered objects: there is a difference between "a book" and "the book" and "a book and the book" and "a book or the book" etc, but the meaning the articles and conjunctions express don't stand up when put into isolation: there is no universal 'a-ness,' 'the-ness,' 'and-ness,' or 'or-ness,' etc to attach secondary meaning to in most cases. The same is true for determiners: 'this-ness' isn't meaningful without additional information.

So, typically objects are confined to nouns, verbs, adjectives, adverbs, and some prepositions: they, without context, present the audience with a substantial literal meaning. When juxtaposed that additional context, objects become associated with impressions, which then causes the symbol to form around that relationship.