What does the entry "abstract, noun 340" mean? abstract nouns is one of 340 topics in the book.

discussion of abstract nouns will take place at 3: 40 p. m.

there are 340 abstract nouns in this book.

information about abstract nouns can be found on page 340 of this book.

According to the information you've given, we can conclude that the entry "Abstract Nouns, 340" is the count of abstract nouns in the book/text.

An abstract noun is a noun that can be touched, felt, (is not an object) and can't be heard (doesn't make any noise, mostly) such as passion, honor, and other things.

Hope it helped,

BioTeacher101

im pretty sure a would be the answer