Under way or underway?
under way is a prepositional phrase meaning “In operation, in progress, commenced”; underway is an adverb meaning “In motion, in progress; being done or carried out; on a journey”. Use under way as a prepositional phrase and underway as an adverb. under way is written as two words and underway as one word; they are used differently.
What is the difference between under way and underway?
| under way | underway | |
|---|---|---|
| Part of speech | prepositional phrase | adverb, noun |
| Meaning | In operation, in progress, commenced Moving through the water; not anchored, moored, aground, or beached | In motion, in progress; being done or carried out; on a journey A road, track, path, or street for going under another way or obstacle; an underpass An underground passage, subway, tunnel |
| Example | The show finally got under way, just 10 minutes late | none recorded |
| Forms | underway | none |
| Pronunciation | not recorded | /ʌndəˈweɪ/ /ʌndəɹˈweɪ/ /ˈʌndə(ɹ)weɪ/ |
| In writing | not counted (the list counts single words) | 7.4 times per million words |
Sources: under way and underway in the English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0); written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
Every current meaning of under way and underway
under way
- 1
In operation, in progress, commenced
- 2
Moving through the water; not anchored, moored, aground, or beached
- 3
Into motion, into its course
The show finally got under way, just 10 minutes late
underway
- 1
In motion, in progress; being done or carried out; on a journey
- 2
A road, track, path, or street for going under another way or obstacle; an underpass
- 3
An underground passage, subway, tunnel
- 4
A voyage, especially underwater
Source: the English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0); obsolete, archaic, dialect and rare senses left out.
Which is more common, under way or underway?
under way is a phrase, which the list of single words does not count; underway 7.4 times per million words.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How many people search under way vs underway?
“under way vs underway” is searched about 50 times a month on Google and 10 on Bing in the United States. Google counts close variants of a query together (“underway vs under way”, “under way or underway”).
Sources: Google Ads keyword data through DataForSEO and Microsoft Advertising keyword data through DataForSEO, the average month from September 2025 to August 2026.