The idiomatic expression "on the cusp of" means being at or very near a transitional point. It suggests that something new, important, or transformative is about to happen. It implies imminence and anticipation, like standing right at the edge of a significant change or development.
While "cusp" literally refers to a pointed end where two curves meet (often used in astrology or architecture), the idiom has shed its literal meaning. It's almost exclusively used figuratively to describe states of transition.
The register is generally neutral to slightly formal, suitable for both written and spoken contexts.
"On the cusp of" is typically followed by a noun or gerund phrase (a verb ending in -ing that functions as a noun). It describes what the subject is about to transition into. You can modify it with adverbs like "right" or "just" for emphasis (e.g., "right on the cusp of"). It can be used in both affirmative and negative contexts, though the negative usage is less common. Questions are also possible, though less frequent.
Using "on the cusp of" literally (e.g., referring to the cusp of a building) would sound unnatural, as would using it in contexts that don't involve a significant transition or impending change. Overusing the phrase can also make your writing sound cliché.
"He was on the cusp of 18." — The New York Times - Sports
""We're on the cusp of something"". — The New York Times - Magazine
"Everything is on the cusp of change." — The Guardian
"It's hard," she said softly, on the cusp of tears." — The New York Times
"Archeology is on the cusp of a technological transformation." — The New Yorker
Examples sourced from https://ludwig.guru/s/on+the+cusp+of
| Phrase | Context |
|---|---|
| on the verge of | Very similar meaning; implies a more immediate likelihood. |
| on the brink of | Implies a more dangerous or critical transition point. |
| about to | Simple and direct; less formal. |
| approaching | More general; indicates nearness without emphasizing imminence. |
| nearing | Similar to "approaching" but can also refer to age or quantities. |
| at the threshold of | More formal and literary; emphasizes entering a new phase. |
| on the horizon | Suggests something is coming but may be further off than "on the cusp of". |
A common mistake is using "on the cusp of" in situations that don't involve a significant transition or impending change. Also, avoid using it literally unless you're actually referring to a cusp (e.g., in architecture). Learners often confuse it with similar phrases like "on the verge of" or use an incorrect preposition, such as "at the cusp of."
| Expression | Idiomatic Meaning | Register | Avoid In |
|---|---|---|---|
| on the cusp of | At or near a transitional point; about to experience a significant change. | Neutral to slightly formal | Literal contexts (unless referring to an actual cusp); situations without impending change. |
No, the expression "on the cusp of" is almost always used figuratively. While "cusp" has a literal meaning, the idiomatic phrase refers to being at a transitional point, not a physical cusp.
While both phrases are very similar, "on the cusp of" suggests a general state of transition, while "on the verge of" often implies a more immediate and potentially decisive moment. "On the verge of" can also carry a sense of danger or risk, which "on the cusp of" usually lacks.
The correct preposition is "on." Using other prepositions like "at" (e.g., "at the cusp of") is incorrect and sounds unnatural. Remember the phrase: "on the cusp of."
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