From the American
Heritage Dictionary (3rd edition) – software version, comes
v. pla·gia·rized, pla·gia·riz·ing,
pla·gia·riz·es. --tr. 1. To use and pass off as
one's own (the ideas or writings of another). 2. To appropriate
for use as one's own passages or ideas from (another). --intr. To
put forth as original to oneself the ideas or words of another. --pla“gia·riz”er
Note that it is
plagiarism to use another’s ideas without giving credit
to the originator of those ideas, and claiming those ideas as your own
original ideas. It is not
just stealing specific words.
Also read the
references below on the topic.