Definition of selfish
1
: concerned excessively or exclusively with oneself : seeking or concentrating on one's own advantage, pleasure, or well-being without regard for others
2
: arising from concern with one's own welfare or advantage in disregard of others
a selfish act
3
: being an actively replicating repetitive sequence of nucleic acid that serves no known function
selfish DNA
also
: being genetic material solely concerned with its own replication
selfish genes
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Merriam-Webster unabridged
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Time Traveler for selfish
The first known use of selfish was in 1628
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