I'm sure you are well aware of Sotomayer using her position to try and change the terms:
http://www.the-912-project.com/2009/12/11/sotomay…

One other definition is exceedingly useful since you’ll hear with every piece of amnesty legislation, the open border lobbyists, facilitators and illegal alien advocates declaring that it isn’t amnesty in the hope that you will think so. Here’s the definition of amnesty so you can decide for yourself:

AMNESTY is legislation to forgive the breaking of immigration laws and to make it possible for illegal aliens to live permanently in the United States. Amnesty represents a system of federal rewards and assistance for illegal aliens, and they entice an even greater number of foreign nationals to illegally enter a country. Amnesty is providing the ultimate goal of the perpetrators illegal entry…legalization of their presence.

AMNESTY:
1.A general pardon for offenses against a government
2.An act of forgiveness for past offenses, esp. to a class of persons as a whole
3.Forgetting or overlooking any past offense

There you have it, folks. Knowledge is power…use it wisely.

They are not immigrants, not undocumented immigrants (Dead Kennedy and the PC fan favorite), not undocumented workers, not undocumented Americans (Harry Reid’s favorite), not economic immigrants (Big Business and Wall Street favorite), not immigrants without work papers, not people who are working (Enrique Morone’s favorite), not migrant workers, not entrants, not day laborers, not the “unbanked” (Bill Clinton and Arnold Schwarzenegger’s favorite) and certainly not “new Americans” the latest term applied by the new amnesty zealots.

The government has defined them as "illegal aliens" and explicitly uses that term in all its laws and statutes. So keep it simple…a spade is a spade…they are illegal aliens. Or, if you’d prefer, another term that would be just as correct to use is "invaders". I would consider the two interchangeable.

INVADE:
1.to enter like an enemy: Locusts invaded the fields
2.to enter as if to take possession: To invade a neighbor's home
3.to enter and affect injuriously or destructively, as disease: Viruses that invade the bloodstream.
4.to intrude upon: To invade the privacy of a family.
5.to encroach or infringe upon: to invade the rights of citizens.
6.to permeate: The smell of baking invades the house.
7.to penetrate; spread into or over: The population boom has caused city dwellers to invade the suburbs

Those illegally in a country are not "immigrants". There is no such thing as an "illegal immigrant". An immigrant is involved with an established and orderly procedure of immigration (entering a country to which one is not native in order to settle there by legal process).

With the vitriolic immigration debate roiling in all parts of our country, it is important to understand terminology. Be prepared to dispel the half-truths and no truths of the way those who are illegally in our country are described by their advocates. Knowledge is power:

ILLEGAL:
1.) Unlawful; illegitimate; illicit; unlicensed.
2.) Illegal, unlawful, illegitimate, illicit, criminal can all describe actions not in accord with law.
3.) Illegal refers most specifically to violations of statutes.
4.) Prohibited by law

ALIEN:
1.) a person who is not a citizen of the country.
2.) in the United States any person born in another country to parents who are not American and who has not become a naturalized citizen. There are resident aliens officially permitted to live in the country and illegal aliens who have sneaked into the country or stayed beyond the time allowed on a visa.