American Heritage Dictionary
(1)
Century Dictionary
(3)
GNU Webster's 1913
(1)
WordNet
(2)
Elsewhere on the web
He's an opportunist, which is why he accepted the "tainted" seat, but he's also the junior senator from Illinois.— Crooks and Liars
I am not a victim - I am an opportunist, and an optimist.— Top Story
She's an opportunist, and her writing is the most nauseating kind of glurge, but it sells.— Top Stories - Google News
Doesn't seem like an opportunist, and though Bright is the worst Democrat his partisan loyalty numbers are still like 40\%. by: you @ soon— Swing State Project
Couldn't they see that Obama was an opportunist, a user?— Hattie's Web

Century Dictionary (1)
Bubble size: how much this word was used in a year
Bubble height: used more or less than expected, vs. all uses evenly distributed
You can expect to see this word about once a month.
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