Corrections Officer Entrance (CJBAT) Practice Exam

The term "abstract" typically refers to concepts that are not grounded in physical reality, often dealing with ideas or notions that cannot be directly perceived or measured. In contrast, "concrete" pertains to things that are tangible and can be observed or experienced through the senses. Concrete ideas represent real, specific examples or events, making them the opposite of the abstract.

This distinction highlights the difference between ideas that are more conceptual versus those that have physical presence or can be easily identified. When considering the other terms, "intangible" and "ethereal" align more closely with the idea of being abstract since they both deal with things that lack physical form or presence. "Theoretical" also connects to abstract thinking, as it often involves ideas that have not been practically realized or observed. Therefore, "concrete" serves as the best antonym to "abstract," emphasizing the contrast between physical reality and conceptual ideas.