entry
theory
/ˈθiːəɹi/An explanation built from observation and reasoning.
From Greek thea (view) + Greek hor (to see).
from Late Latin theoria (Jerome)
+1 more sourcefrom PIE root *wer- (3) "to perceive." Philosophy credits sense evolution in the Greek word to Pythagoras. The sense of...
from Late Latin theoria (Jerome)
+1 more sourcefrom Late Latin theoria (Jerome)
+1 more sourcefrom Middle French théorie, a learned borrowing
Word Ancestry
from Late Latin theoria (Jerome)
+1 more sourcefrom PIE root *wer- (3) "to perceive." Philosophy credits sense evolution in the Greek word to Pythagoras. The sense of...
from Late Latin theoria (Jerome)
+1 more sourcefrom Late Latin theoria (Jerome)
+1 more sourcefrom Middle French théorie, a learned borrowing
Ancient Greeks did not think of thinking as something disembodied and abstract; they pictured it as looking. A theōros was a spectator, the sort of person who stood at the edge of a festival or a mystery ceremony and watched closely, and that same visual obsession gave us theōria, a word for contemplation that began life as a kind of intellectual sightseeing. Latin writers like Jerome carried the term over, and by the 1590s English had it too, first as a fancy label for mental schemes and then, by the 1600s, for the kind of explanation that tries to make the world behave on paper. That is why theory keeps such a tight little family resemblance to theater: both are built on seeing, one with your eyes and one with your mind. It is also why theoretical still feels like the cool, detached cousin of practical. A theory, at bottom, is what happens when you stop merely staring at the world and start asking it for a pattern.
The Story
Ancient Greeks did not think of thinking as something disembodied and abstract; they pictured it as looking. A theōros was a spectator, the sort of person who stood at the edge of a festival or a mystery ceremony and watched closely, and that same visual obsession gave us theōria, a word for contemplation that began life as a kind of intellectual sightseeing. Latin writers like Jerome carried the term over, and by the 1590s English had it too, first as a fancy label for mental schemes and then, by the 1600s, for the kind of explanation that tries to make the world behave on paper. That is why theory keeps such a tight little family resemblance to theater: both are built on seeing, one with your eyes and one with your mind. It is also why theoretical still feels like the cool, detached cousin of practical. A theory, at bottom, is what happens when you stop merely staring at the world and start asking it for a pattern.
Modern Usage
A guess or hunch, especially in casual speech; in science, an evidence-based explanatory framework.
Popularized by: Everyday English plus scientific writing and internet usage
Notable References
- common meme-like use: 'My theory is...'
- scientific usage contrasting everyday speech
Kin & Kindred
From 'thea'·view; sight; looking
Derived Terms
English words from this root
From 'hor'·to see; to look at; to perceive
Derived Terms
English words from this root