In the postal service, the limit of weight allowed for any single rate of postage: as, the rate-limit for first-class mail-matter (sealed letters) is one ounce for two cents.(noun)
The Century Dictionary (Public Domain)
Use "rate-limit" in a sentence
"Reducing the API rate-limit is not the first or only method we use and is one we try to avoid if possible."
"I found that foursquare would rate-limit me if I added them too quickly, so I added them two and a half minutes apart."
"With this you can rate-limit your applications or protocols when sending."