* Abstract nouns represent concepts, ideas, qualities, or states of being. They are not tangible things you can touch or see.
* Sacrifice is the act of giving up something valuable for the sake of something else, usually considered more important. It's a concept, not a physical object.
Examples:
* The soldier made the ultimate sacrifice. (The sacrifice is the act of giving up their life, not a physical object.)
* Love requires sacrifice. (Love is an abstract noun, and sacrifice is the act of giving up something for it.)
Therefore, "sacrifice" fits the definition of an abstract noun.