Spam noun [uncountable]
trademark a type of cheap canned meat made mainly from pork

[TahlilGaran] Dictionary of Contemporary English ▲

I. spam¹ /spæm/ verb (past tense and past participle spammed, present participle spamming) [intransitive and transitive]
[Date: 1900-2000; Origin: Probably from Spam]
to send the same message to many different people using email or the Internet, usually as a way of advertising something – used to show disapproval
—spamming noun [uncountable]
—spammer noun [countable]

[TahlilGaran] Dictionary of Contemporary English ▲

II. spam² noun [uncountable]
email messages that a computer user has not asked for and does not want to read, for example from someone who is advertising something:
You can filter out spam with special software.

[TahlilGaran] Dictionary of Contemporary English ▲

advertisement:
an advertisement for shampoo
They placed an advertisement in the newspaper.
ad informal an advertisement:
She’s been in several TV ads.
advert British English an advertisement:
a job advert
He took out a front-page advert for his shop.
commercial an advertisement on television or radio:
television commercials
He was in some commercials for beer.
trailer an advertisement in the cinema, on television, or online for a film or programme which will be shown soon:
A second trailer for Richard Friedman’s film has just been added to the website.
promotion a series of advertisements for a company’s products:
The company has spent more than $300 million on promotions for the brand.
poster an advertisement on a wall:
They selected a famous artist to do the poster for the upcoming performance.
billboard (also hoarding British English) a large sign next to a road, with an advertisement on it:
billboard advertisements
A huge hoarding shows two contrasting images.
flyer a piece of paper with an advertisement on it, often given to you in the street:
Someone was handing out flyers for a new nightclub.
banner ad an advertisement across the top of a page on the Internet:
Banner ads are becoming more sophisticated.
junk mail unwanted advertisements that you get in the post:
I never read junk mail.
spam unwanted emails advertising things:
I’m trying to delete all the spam.
classified ad (also want ad American English, small ad British English) a short advertisement that you put in a newspaper if you want to buy or sell something:
The bike was advertised for sale in the small ads section.

[TahlilGaran] English Thesaurus ▲

email a message sent using the email system:
Did you get my email?
There were about 20 emails in my inbox that morning.
message an email – used when it is obvious that you are talking about a message sent by email, rather than a message sent by some other method:
I deleted your message by mistake.
attachment a document or file that is sent with an email:
You can email the photo to me as an attachment.
spam unwanted email messages from advertisers:
I was getting so much spam that I changed my email address.
phishing the activity of sending emails in order to trick someone into giving away information such as their bank account number or their computer password. This information is then used to get money or goods:
Yahoo announced new measures to protect users from phishing.

[TahlilGaran] English Thesaurus ▲

SPAM
[not an acronym] written spam -- slang name for Unsolicited Commercial Email (UCE; junk/bulk email) 
Some Place Around Montana / Missouri / Massachusetts / Mississippi / Maine

[TahlilGaran] Acronyms and Abbreviations Dictionary ▲