When refering to a drinking container, the plural is glasses.
The Plural of GlassWhen refering to the material, glass is a mass noun. For example:
- Multi-storey buildings are frequently constructed with walls made almost entirely of glass.
- In early 17th century England, glass became common in the windows of ordinary homes.
- While we may not need eight glasses a day, there are plenty of reasons to drink water.
- My grandmother is over eighty and still doesn't need glasses. She drinks right out of the bottle. (Henny Youngman)
|Type||Example of Type||Forming the Plural||Plural|
|Most Nouns|| cat
|add s|| cat
|Noun Ending s, sh, ch, x or z|| glass
|add es|| glasses
|Nouns ending [consonant] o|| mango
|add either s or es
(There are no rules for this - you have to know.)
| mangoes or mangos
|Nouns ending [vowel] o|| patio
|add s|| patios
|Nouns ending [consonant] y|| story
|change the y to an i and add es|| stories
|Nouns ending [vowel] y|| storey ()
|add s|| storeys
|Mass nouns|| glass
|some nouns do not have a plural form
|Nouns ending f or fe|| dwarf
|ves and/or s
(There are no rules - you have to know.)
|some nouns undergo a vowel or letters change|| geese
|More exceptions|| salmon
|some nouns do not change at all|| salmon
Why Is There Confusion over the Plural of Glass?Confusion arises because the plural is depends on the meaning of glass.
When talking about the material, glass is a mass noun. A mass noun is a noun without a plural form. They refer to items that can't be counted (e.g., music, milk, chalk).
When refering to the drinking container, the plural is glasses.
Of note, glasses is also another word for spectacles.