Simple past tense and past participle of unsubscribe.(verb)
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Use "unsubscribed" in a sentence
"I was a long time reader of this site .. and have just unsubscribed from the RSS feed."
"Like you, I deleted some bookmarked sites and unsubscribed from a couple of listservs and have felt tremendous freedom in that."
"When I unsubscribed from the Mob Blogs I found ... the remaing blogs that I did read were balanced, fair, thoughtful and dedicated to maintaining a healthy Internet environment."