The law states that the person being adopted must be a child. Therefore, no.
Adoption law varies state to state but in general the short answer is yes. You can adopt someone of any age. Of course, to make someone an heir to your estate, the easier way would be to execute a will.
Without parental permission, age 18. With, over the age of 16 in most states.
18. The age of consent is 18 in all states. Until you reach 18 you are a minor and if you date someone 18 or over they can be charged with rape.
When you are 18, you are an adult by law and no one can adopt you legally.
'Signing over their rights to a child' sounds like adoption here. Most states have laws set about who can adopt. Usually people over the age of 25 and / or married couples. Not to say that you cannot adopt under the age of 25, but I do believe that you must be at least 18 to adopt a child in some states. Minors under the age of 18 are not considered adults, and therefore cannot adopt children.
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You have to be 18 to date someone over 20 legally.
technically anyone can date anyone. but sex is restricted. if a person under the age of 18 has sex with someone over the age of 18 then the person over the age of 18 can be arrested.
the age to leave USA is 18, by yourself.. get someone to leave with you, or buy a ticket for you that's over 18.
In the UK only minors can be adopted i.e people under the age of 18, this is rarely practised for people over 16 however.
You can date someone over the age of 18 anywhere but you can't engage in sexuall activity, and that's all over the USA.
A date. There is no special name for it just because of age.