1. It means girls use makeup. (Noun) Yes. Make-up is another word for cosmetics. Note that it normally has a hyphen. Also remember that some boys/men use make-up too! :-D
2. copy, fake - (Verb) Not really "copy". It's more like "to invent". I made up a story to explain why I didn't go to work = I invented a story
3. consist of - (Verb) This is normally used in the passive "to be made up of..." For example "The team will be made up of 5 men and 4 women".
Actually, I [STRIKE]didn't[/STRIKE] don't know all [STRIKE]make up[/STRIKE] the meanings of "make up", and therefore I need [STRIKE]some body [/STRIKE] somebody to give me [STRIKE]explain[/STRIKE] explanations and examples in English.
See above. More meanings:
to make up = to become friends again after having an argument. "I had an argument with my boyfriend but it's OK, I think we'll make up!" There is a lovely phrase that is sometimes used with two children who have had a silly argument. Their parent/teacher might say "Come on, you two. Kiss and make up!" It means that they want the two children to forget the argument and be friends again.
to make up = to add an amount (of money, for example) so that the total reaches a specific amount. For example: "The bill is €100, but we only have €90 on the table. Don't worry. I'll make up the difference." This would mean that I am offering to add the extra €10 required so that we have €100 in total.
to make up = to put together/to construct. "I have made up a bag of clothes ready to take them to the charity shop." "I've been to Ikea and bought a bookshelf, which I need to make up tonight."
to make up = to apply make-up/cosmetics. "I'll be ready to go out as soon as I've made up". Note we would be more likely to say "....as soon as I've done my make-up".
to make up = to put in order/to tidy. You will see on the little signs that you hang on hotel room doors "Please make up my room". This is a request to the chambermaids, explaining that you would like them to come into the room and make the bed, clean the bathroom etc.
to make up
for = to compensate. "I was very mean to a friend the other day, but I'm going to make up for it by taking her out for dinner tonight."
I'm sure someone else will come up with some more definitions.