The phrasal verb "look up" is predominantly used in informal speech, though it occasionally appears in formal contexts. It typically means to search for information about something, often in a book or on the internet, such as "I need to look up the definition of this word." "Look up" may also be used in the context of visiting or making contact with someone, for example, "If you're ever in town, look me up." It is a versatile verb that can fit into various settings where information retrieval or social intentions are involved. The phrasal verb connotes a proactive and intentional act of seeking out information or individuals and is frequently used in everyday communication.
B1
PreIntermediate
1. To search for and find specific information in a book, online or through inquiry.
Please look up the definition of the word in the dictionary.
I need to look up the train schedule for tomorrow.
Before you go, look up their address on the website.
2. To visit someone after arriving in a place.
When you get to New York, don't forget to look me up.
She promised to look up her old friend during her trip to Paris.
If you ever come to my city, be sure to look me up.
3. To improve, especially in terms of conditions or situations.
After the long winter, the weather is finally starting to look up.
Things are looking up for their business after the successful launch of their new product.
His health has been looking up since he started the new treatment.