Wordnet 3.0
NOUN (1)
1.
a computer program that retrieves documents or files or data from a database or from a computer network (especially from the internet);
WordNet (r) 3.0 (2006):
search engine
n 1: a computer program that retrieves documents or files or
data from a database or from a computer network (especially
from the internet)
The Free On-line Dictionary of Computing (30 December 2018):
search engine
A remotely
accessible program that lets you do keyword searches for
information on the Internet. There are several types of
search engine; the search may cover titles of documents,
URLs, headers, or the full text.
A list of search engines
(http://cuiwww.unige.ch/meta-index.html#MISC), Centre
Universitaire d'Informatique at the University of Geneva
(1995-11-28)