What are some the examples of nouns that singular in meanings?

It's helpful to think about "singular in meaning" as uncountable nouns, which refer to things that can't be easily counted as individual items. Here are some examples:

Abstract concepts:

* Happiness

* Love

* Advice

* Information

* Knowledge

* Music

* Progress

* Time

Materials and substances:

* Water

* Air

* Gold

* Sand

* Furniture (though we can count different pieces of furniture)

* Luggage (again, we can count individual suitcases)

General categories:

* Weather

* Traffic

* Research

* Equipment

* Clothing

Other examples:

* Homework

* Scenery

* Money

* News

Important note: Some of these words can be used in a countable way if you are referring to specific instances or types. For example, you could have "two pieces of advice" or "three different types of music". However, in their most general and abstract forms, they remain uncountable and singular in meaning.