"doubled" in the verb sense
1. double, duplicate
"The population doubled within 50 years"
hit a two-base hit
3. double over, double, double up
bend over or curl up, usually with laughter or pain
"He doubled and vomited violently"
do double duty serve two purposes or have two functions
"She doubles as his wife and secretary"
bridge: make a demand for (a card or suit)
6. duplicate, reduplicate, double, repeat, replicate
make or do or perform again
"He could never replicate his brilliant performance of the magic trick"
"doubled" in the adjective sense
1. double, doubled, twofold, two-fold
twice as great or many
"ate a double portion"
"the dose is doubled"
"a twofold increase"
Source: WordNet® (An amazing lexical database of English)
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