outdated

Everyday

1. Old-fashioned; no longer used or useful because something newer exists. tree →
2. No longer correct or true because things have changed: outdated information. tree →

In the lessons

In science and technology lessons, outdated ideas have been replaced by better ones (like the idea that Earth is flat). In everyday life, outdated phones, clothes or maps. In data and maths, outdated figures may give wrong answers. Phrases: outdated technology, outdated information.

Examples

• Our classroom computer is really outdated. tree →
• The map was outdated, so we got lost. tree →
• People once believed the Sun went round the Earth, but that idea is outdated. tree →
• Grandpa's phone is outdated; it can't send photos. tree →
• This website has outdated prices. tree →
• Some of the rules in the book are outdated now. tree →

Note

Adjective. Opposite: up to date, modern, current. Similar: old-fashioned, obsolete. Do not confuse with «out of date» on food, which means past its best and maybe unsafe to eat.