Definition of espies:
(v) :
(transitive) To find out or observe (someone or something, especially if not easy to see) by spying or looking; to catch sight of; to see; to spot.
(v) :
(transitive) To see (someone or something) without foreplanning or unexpectedly.
(n) :
(countable) An act of finding out or observing by spying or looking; an espial or espying.
(n) :
(uncountable) The act or process of learning secret information through clandestine means; espionage.
(n) :
(countable) A scout or spy.
(v) :
(transitive) (obsolete) To observe (someone or something) as a spy; also, to examine or observe (someone or something) carefully; or to look out or watch for.