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warrior (esp. of military retainers of daimyos in the Edo period); samurai
person with a strong backbone; person that does incredible things; person of considerable talent
「侍」 has another reading with different meanings.
映画は江戸時代の侍の生き様を描いている。
The movie depicts the way of life of samurai in the Edo period.
江戸時代の侍について学びました。
I learned about samurai from the Edo period.
武士道は侍の精神的な支柱となっていた。
Bushido was the spiritual pillar of the samurai.