ISEE/SSAT Vocabulary BuilderWordsTtheory
ISEE/SSATeasy
theory
Meaning: an idea that may explain how or why something happens
theory in a sentence
How theory is used in real sentences:
Our theory was that the classroom plant leaned toward the window because it needed light.
Liam tested his theory that adding larger wheels would make the model car travel farther.
“Both records supported his theory that careful waste removal protects the fungus from dangerous germs.”
— from the passage The Garden Below
Synonyms for theory
Other words for theory — explanation, hypothesis and supposition — carry the same meaning.
- explanation
- hypothesis
- supposition
Antonyms of theory
Words that mean the opposite of theory:
- fact
- certainty
Where it comes from
From Greek theoria 'a way of looking at something'
Memory hook
A theory is an idea about the reason behind a mystery.