As an expert in the field of linguistics, I often delve into the nuances of word usage and grammatical classifications. The question at hand is whether "glasses" is a countable or uncountable noun. To address this, let's first understand the distinction between the two.

Countable nouns are those that can be counted and have both singular and plural forms. They can be used with numbers and can be quantified with words like "few" or "many." On the other hand, uncountable nouns refer to substances or concepts that are not easily counted and do not have a plural form. They are often used with quantifiers like "much," "little," "some," "any," etc.

Now, the term "glasses" can refer to two different things: eyeglasses or drinking glasses. When referring to eyeglasses, "glasses" is typically a plurale tantum, which means it does not have a singular form and is always used in the plural. In this context, "glasses" is countable because we can say "one pair of glasses" or "two pairs of glasses."

However, when "glasses" refers to drinking vessels, it is a countable noun as well. We can count the number of glasses, for example, "I have three glasses on the table."

The reference material provided mentions "glass" as a substance, which is indeed uncountable. We cannot count "glass" in the abstract sense, as it is a material. But when "glass" is used to refer to a specific type of material, such as "several glasses" meaning different kinds of glass material, it takes on a countable sense.

In conclusion, "glasses" as a noun referring to either eyeglasses or drinking glasses is countable because it can be counted and quantified. The distinction between countable and uncountable nouns is an important aspect of English grammar and understanding it can greatly enhance one's language proficiency.

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Nouns' senses are assumed countable unless specifically marked uncountable. For example, glass, as a substance, is uncountable. We say glass is breakable. A phrase like several glasses in this bottle is made of several glasses means --this bottle is made of several different kinds of glass.--read more >>