Definition of like preposition from the Oxford Advanced Learner's Dictionary

Oxford3000

like

preposition
laɪk
 
; laɪk
 
 
1 similar to somebody/somethingShe's wearing a dress like mine.He's very like his father.She looks nothing like(= not at all like) her mother.That sounds like (= I think I can hear) him coming now.2 used to ask somebody's opinion of somebody/somethingWhat's it like studying in Spain?This new girlfriend of his—what's she like?3 used to show what is usual or typical for somebodyIt's just like her to tell everyone about it.4 in the same way as somebody/somethingStudents were angry at being treated like children.He ran like the wind (= very fast).You do it like this.I, like everyone else, had read these stories in the press.Don't look at me like that. (informal) The candles are arranged like so(= in this way).5 for exampleanti-utopian novels like ‘Animal Farm’ and ‘1984’
Idioms

more like…

used to give a number or an amount that is more accurate than one previously mentioned
He believes the figure should be more like $10 million.

more like (it)

(informal)1 better; more acceptableThis is more like it! Real food—not that canned muck.2 used to give what you think is a better description of somethingJust talking? Arguing more like it.

what is somebody like?

(British English, informal) used to say that somebody has done something annoying, silly, etcOh, what am I like? I just completely forgot it.
Usage noteUsage note: similarlyMaking comparisonsThis chart provides a comparison of the ways that teenage boys and girls in the UK spend their free time.In many cases, the results for boys and girls are virtually the same/identical.In many cases, the results for boys are virtually the same as/identical to the results for girls.Both boys and girls spend the bulk of their free time with friends.Most of the boys do more than two hours of sport a week, as do many of the girls.Like many of the girls, most of the boys spend a large part of their free time using the Internet.The girls particularly enjoy using social networking websites.Similarly, nearly all the boys said they spent at least two to three hours a week on these sites. Language Banks at contrast, illustrate, proportion, surprisingUsage noteUsage note: as / likeYou can use both as and like to say that things are similar.Like is a preposition and is used before nouns and pronouns:He has blue eyes like me.As is a conjunction and an adverb and is used before a clause, another adverb or a clause beginning with a preposition:She enjoys all kinds of music, as I do. Repeat these five steps, as in the last exercise.In informal English like is frequently used as a conjunction or an adverb instead of as:Nobody understands him like I do. I don’t want to upset him again like before. It is also used instead of as if:It looks like we’re going to be late. These uses of like are common but are not considered correct in formal written English.You will find more help on the use of as and like in the entries for particular verbs, such as act, behave, etc.