Trop. , to watch , be watchful or vigilant , to be on the alert : curam rei publicae summae defendundae jam pridem apud vos excubare, is watchful , active .

http://lila-erc.eu/data/lexicalResources/LewisShort/id/LexicalSense/n16740.5 an entity of type: LexicalSense

Trop. , to watch , be watchful or vigilant , to be on the alert : curam rei publicae summae defendundae jam pridem apud vos excubare, is watchful , active . 
Trop. , to watch , be watchful or vigilant , to be on the alert : curam rei publicae summae defendundae jam pridem apud vos excubare, is watchful , active . 

data from the linked data cloud