Part of Speech: Verb

Definition: to take the place of (someone or something that is old, no longer useful, etc.) : to replace (someone or something)

Source: http://www.merriam-webster.com/dictionary/superseded

Meaning: In the lines while reading The Brooklyn Bridge I saw a phrase which was Brooklyn Bridge’s technological achievements have been superseded. It meant that even though the bridge is cherished and stayed as one of the most wonderful bridge but it still fall backs in matter of technological issues.