Open Keyterms

Plain-language definitions for the terms you keep running into online

Browse the index, open a term, then follow the link to the fuller entry.

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Tap a letter to jump to a term; every entry links to a longer write-up.

About these entries

Entries are written and checked by a small group of readers and editors, then revised whenever a term shifts in everyday use.

The entries

Shows & Movies
How ad-supported services run, why the ads appear, and where their catalogues differ.Open the full shows & movies entry
Fitness & Health
Low-effort changes you can actually keep: a daily walk, water, and a regular bedtime.Open the full fitness & health entry
Privacy & Security
The tells in a scam text or email: urgency, an odd link, and a push to 'confirm' details.Open the full privacy & security entry