Nelson-Denny Practice Test 2025 – Complete Exam Prep Resource

The word 'abstract' refers to concepts or ideas that are not grounded in physical reality; they are often theoretical or intangible. In contrast, 'concrete' describes something that is specific, definite, and tangible. It refers to objects or ideas that can be perceived through the senses. In many contexts, when something is concrete, it is clearly understandable and relates to real, physical examples. This specific meaning makes 'concrete' the antonym of 'abstract,' as it emphasizes clarity and physical presence rather than vague ideas or theories. The other options, such as 'theoretical,' 'conceptual,' and 'imaginary,' all maintain a level of abstraction, referring to ideas that do not represent tangible realities.