signed in

USAGE SUMMARY

"signed in" is correct and usable in written English. You can use it when referring to the action of logging into an account or system. Example: "I signed in to my email account." Alternative expressions include "logged in" and "entered."

✓ Grammatically correct

News & Media

Academia

Wiki

Science

Encyclopedias

Human-verified examples from authoritative sources

Exact Expressions

59 human-written examples

I signed in.

The New Yorker

Signed in.

The New York Times - Sports

I had signed in first.

The New Yorker

Signed in type.

Cornell University

(The treaty was signed in 1963).

The New Yorker

A treaty was signed in September 1936.

Encyclopedia Britannica

They signed in the fall of 2010.

The New Yorker

The nuclear deal was signed in December.

The New York Times

The deal was finally signed in January.

The New Yorker

We signed in an up market.

The New York Times

Human-verified similar examples from authoritative sources

Similar Expressions

1 human-written examples

After signing in, start sketching!

WikiHow

Expert writing Tips

Best practice

In digital interfaces, "signed in" and "logged in" are often interchangeable, but consistency across the UI is key.

Common error

Do not use "signed in" when you mean "signed up". The former refers to accessing an existing account or record, while the latter refers to the creation of a new one.

Linguistic Context

The phrase "signed in" functions as the past tense or past participle of the phrasal verb "sign in". As seen in Ludwig, it is used as an intransitive verb to describe the completion of a login process or as a passive construction to denote the formal execution of contracts and treaties.

Expression frequency: Very common

Frequent in

News & Media

45%

Academia

20%

Wiki

15%

Less common in

Science

10%

Encyclopedias

7%

Legal

3%

Ludwig's WRAP-UP

The phrase "signed in" is a highly versatile expression that bridges the gap between historical diplomacy and modern technology. As analyzed by Ludwig AI, it serves two major roles: describing the formal execution of international treaties (e.g., "The treaty was "signed in" 1992") and the everyday act of digital authentication. Because it is used by prestigious sources like The New York Times and The New Yorker, it is considered grammatically robust and suitable for any writing style, from academic papers to technical guides. Writers should simply be careful to distinguish it from the initial registration process known as "signed up".

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

logged in

More common in modern digital and software contexts for account authentication

authenticated

Technical term used to describe the verification of a user identity

checked in

Used primarily for arrival at physical locations like hotels or airports

ratified

Specific to the formal legal validation of a treaty or agreement

registered

Implies the creation of a new record or account rather than just accessing one

executed

A legal term for finalizing and signing a contract or deed

enrolled

Suggests joining a specific program, course or official list

subscribed

Indicates an agreement to receive or pay for a recurring service

initialed

Refers specifically to signing with only the first letters of a name

endorsed

Implies official approval or signature on a specific financial or legal instrument

FAQs

What is the difference between "signed in" and "logged in"?

Both refer to accessing a system, but "logged in" is more common in technical documentation, while "signed in" is often perceived as more user friendly and is used for both physical and digital entry.

How do you use "signed in" in a sentence?

You can use it to describe authentication, such as "I "signed in" to my account", or formal agreements, like "The treaty was "signed in" Paris".

Is it more correct to use "signed in" or "signed on"?

While both are used, "signed on" often implies joining a project or starting a work shift, whereas "signed in" specifically denotes the act of authentication or registration of arrival.

What is the difference between "signed in" and "signed up"?

"signed in" is used for users who already have an account, whereas "signed up" refers to the initial registration process for a new user.