American Heritage Dictionary
(2)
Century Dictionary
(1)
GNU Webster's 1913
(1)
WordNet
(3)
Elsewhere on the web
I like the definition I've heard: "a dyke is a lesbian with attitude."— AfterEllen.com - Because visibility matters
Romania points out that the Sacalin Peninsula and the most seaward point of the Sulina dyke are among the relevant points notified by Romania to the United Nations under Article 16 of UNCLOS for measuring the breadth of the territorial sea.— Recently Uploaded Slideshows
The few Spaniards who had been stationed upon the dyke were all, despatched or driven off, and the patriots fortified themselves upon it, without the loss of a man.— The Rise of the Dutch Republic — Volume 21: 1573-74
On either side of the dyke was the water, black and silent.— Jeanne of the Marshes
Dyke has been looked up 283 times, favorited once, listed 16 times, and commented on 0 times.

American Heritage 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 several times a year.
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