obsolete – no longer produced or used; out of date

(Pronounced ob-suh-leet)

To remember the definition of the word obsolete, use the following mnemonic:

These are obviously so yesterday. The fleeting (obsolete) moment of popularity is gone, and they're now out of date and no longer produced. 

Examples of obsolete in a sentence

My grandad's house is full of obsolete gadgets. 

The surgeon's obsolete methods were a danger to her patients. 

While many considered the device obsolete, it was still incredibly reliable despite it's age.