The phrasal verb "log in" is predominantly used in informal contexts, especially within the realm of technology and internet usage, where it describes the action of entering a username and password to gain access to a computer system, network, or website. In formal contexts, it might be replaced by "access" or "authenticate," but "log in" is widely accepted across both spoken and written communications due to its precise nature in technology-related discussions. It frequently appears in instructions and user manuals, reflecting its central role in digital interactions. Varied forms such as "log on" or "sign in" are often used interchangeably, but "log in" tends to be the preferred choice in most English-speaking regions. Its usage has expanded with the growing prevalence of digital platforms, making it a familiar verb even to those with basic computer literacy.
B1
PreIntermediate
1. To enter a username and password to gain access to a computer system or website.
I forgot my password, so I couldn't log in to my email account.
You need to log in to your online banking account to check your balance.
2. To start a session on a computer system or an application by identifying oneself.
He likes to log in to his work account before everyone else arrives.
She logged in to the conference call from her laptop.