someday
Someday (adverb) means At an unspecified time in the future. Example: “I'll learn to play the piano someday.”
adverb
1
At an unspecified time in the future.
"I'll learn to play the piano someday."
"Someday you will look back on this and laugh."
"She hopes to visit Japan someday."
How to use someday
Learner’s notesIn plain EnglishAt some point in the future, though nobody knows exactly when.
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I'll learn to play the piano _____.
Etymology
A fusion of some + day.
Synonyms
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Rhymes for someday
See all rhymes for someday →Frequently asked questions
What does “someday” mean?
The word “someday” means at an unspecified time in the future. In plain terms, at some point in the future, though nobody knows exactly when.
How do you use “someday” in a sentence?
Here is “someday” used in a sentence: “She hopes to visit Japan someday.”
What part of speech is “someday”?
“Someday” is an adverb.
Is “someday” a common word?
“Someday” is a fairly common word in modern English, usually learned at around the A2 level.
Is it "someday" or "some day"?
Both are correct but mean different things. "Someday" (one word) is an adverb meaning at an unspecified time in the future: "someday I'll travel the world." "Some day" (two words) means one particular but unnamed day: "choose some day next week for the meeting."
What is the difference between "someday" and "sometime"?
Both refer to an unspecified time, but "someday" only points to the future, while "sometime" can refer to the past or the future. "We met sometime last year" is fine; "someday last year" is not. Use "someday" for hopes and plans, and "sometime" when the timing is simply unknown.
Can "someday" refer to the past?
No. "Someday" means at an unspecified time in the future, so it cannot describe past events. For an unknown time in the past, English uses "sometime" or "one day" instead: "sometime in the 1990s," "one day last summer."
Is "someday" too vague for formal or business writing?
"Someday" is standard English and grammatically fine anywhere, but it is deliberately vague. In business or academic writing, where commitments need dates, a concrete time frame such as "by 2030" or "within five years" is usually preferred over "someday."
