Define Any Word.

Stay on the Page.

Dictionary Lookup

Mid-sentence, you need a definition. Open a new tab, search, scan, come back. Four steps. Thought gone.

Type define aggregate in Quick Launch. Definition appears inline.

Synonyms and pronunciation in every lookup.

Dictionary
serendipity
/ˌserənˈdɪpəti/
noun
1 The occurrence and development of events by chance in a happy or beneficial way.
"a fortunate stroke of serendipity"
2 Good fortune; luck.
Synonyms: chance, luck, fortune, providence, happy accident
Press Enter to copy first definition

Free Dictionary API

World First Browser OS

Launch from Quick Launch

150+ Tools

The Problem

Five Lookups Per Article. Five Broken Trains of Thought.

You’re writing. You hit a word. Is “aggregate” right, or should it be “consolidate”?

You need the definition. So you open a tab. Navigate to Dictionary.com. Type the word. Read the result. Close the tab. Refocus.

Five words per article. Five tab switches. Five broken trains of thought. Each one costs you more than the seconds it takes — it costs you the momentum that was producing the work.

Every dictionary extension on the Chrome Web Store works the same way: highlight text, right-click, wait for a popup, close it, return to writing. Still a disruption. Still a context switch. Still friction between you and the word you need.

How Dictionary Lookup works:

  1. Press Ctrl+Shift+Space (Cmd+Shift+Space on Mac)
  2. Type: define synchronize
  3. See: pronunciation, part of speech, definition, synonyms
  4. Press Escape. Back to work.

Four keystrokes to verify a word. Zero interruptions to your writing.

That shortcut opens the Quick Launch Toolbar — 30+ tools, same keystroke.

Who Uses This

Same Toolbar. Different Reasons.

  • WritersDefine, verify, continue — in the same breath. Synonyms help you find the sharper word without opening a thesaurus in another tab.
  • SEO ProfessionalsSynonyms surface semantically related terms that Google values for entity coverage. Pronunciation data helps optimize for voice search queries.
  • DevelopersCheck terminology while writing documentation. No switching between your IDE and a dictionary site.
  • Content TeamsConsistent terminology across drafts. Everyone checks definitions from the same place. No more “I thought that word meant something different” in editing rounds.

No Limits

The Free Dictionary API. Unlimited Lookups.

The Free Dictionary API at dictionaryapi.dev powers every lookup.

No API keys. No credit card. No subscription. No “you’ve exceeded your daily limit” warning on a Tuesday afternoon.

Unlimited lookups. Reliable data. Instant response. The API is free and open — which means this feature works the same way on day 1 as it does on day 1,000.

Real pronunciation:
Not synthesized text-to-speech. Audio from native speakers returned by the API. Matters when you’re recording a video, rehearsing a presentation, or optimizing content for voice search. Hear the word. Don’t guess it.

Related terms:
Synonyms listed with their definitions so you see the difference. “Happy” and “cheerful” and “elated” are not the same word. The subtle distinction between them is the difference between good writing and precise writing.

How to Access

Ctrl+Shift+Space. Type define [word]. Done.

Quick Launch Toolbar is your command palette for the browser. Press Ctrl+Shift+Space (Cmd+Shift+Space on Mac), type your command, press Enter.

For Dictionary Lookup: define [word]

Results load instantly from the Free Dictionary API. No configuration. No setup. No account.

Part of SEO Time Machines — One extension. 150+ tools. The first operating system for browser-based work.

Part of the
Quick Launch Toolkit