Tra từ scan - Từ điển Oxford Advanced Learner 8th

scan [scan scans scanned scanning] verb, noun BrE [skæn] NAmE [skæn]
verb (-nn-)
1. transitive to look at every part of sth carefully, especially because you are looking for a particular thing or person
Syn: ↑scrutinize
•~ sth for sth He scanned the horizon for any sign of land.
•~ sth She scanned his face anxiously.
2. transitive, intransitive to look quickly but not very carefully at a document, etc
•~ sth (for sth) I scanned the list quickly for my name.
•~ through sth (for sth) She scanned through the newspaper over breakfast.
3. transitive ~ sth to get an image of an object, a part of sb's body, etc. on a computer by passing ↑X-rays, ↑ultrasound waves or ↑electromagnetic waves over it in a special machine
•Their brains are scanned so that researchers can monitor the progress of the disease.
4. transitive ~ sth (of a light, ↑radar, etc.)to pass across an area
•Concealed video cameras scan every part of the compound.
5. intransitive, transitive ~ (sth) (computing) (of a program)to examine a computer program or document in order to look for a virus
•This software is designed to scan all new files for viruses.
6. transitive ~ sth (computing)to pass light over a picture or document using a ↑scanner in order to copy it and put it in the memory of a computer
•How do I scan a photo and attach it to an email?
7. intransitive (of poetry)to have a regular rhythm according to fixed rules
•This line doesn't scan.
Verb forms:

Word Origin:
late Middle English (as a verb in sense 5): from Latin scandere ‘climb’ (in late Latin ‘scan (verses)’), by analogy with the raising and lowering of one's foot when marking rhythm. From ‘analyse (metre)’ arose the senses ‘estimate the correctness of’ and ‘examine minutely’, which led to ‘look at searchingly’ (late 18th cent.).

Example Bank:
•He scanned through the web pages.
•I scanned the paper for news.
•My eyes scanned across the horizon.
•She scanned the street nervously, looking for the two men.
•I scanned the list quickly, looking for my name.
•She scanned his face anxiously, trying to see if he was lying to her.
•You should teach students to scan for essential information.
Derived: ↑scan something in ▪ ↑scan something into something

noun
1. countable a medical test in which a machine produces a picture of the inside of a person's body on a computer screen after taking ↑X-rays
•to have a brain scan
2. countable a medical test for pregnant women in which a machine uses ↑ultrasound to produce a picture of a baby inside its mother's body
•to have a scan
3. singular the act of looking quickly through sth written or printed, usually in order to find sth
•a scan of the newspapers
•I had a quick scan down the guest list but couldn't see my name.

Word Origin:
late Middle English (as a verb in sense 5): from Latin scandere ‘climb’ (in late Latin ‘scan (verses)’), by analogy with the raising and lowering of one's foot when marking rhythm. From ‘analyse (metre)’ arose the senses ‘estimate the correctness of’ and ‘examine minutely’, which led to ‘look at searchingly’ (late 18th cent.).

Example Bank:
•A routine scan revealed abnormalities in the foetus.
•A scan revealed a small fracture in the hip area.
•The doctors took a scan of his thigh bone.
•At twenty weeks she had a scan and the midwife told her the baby looked fine.
•The brain scan revealed no signs of injury.