Added 8 October 2026

deep

/diːp/ adjective

In Latin: profundus, altus Wiktionary

adjective Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about deep at Wordnik → Where our words come from →

Extending, reaching or positioned far from a point of reference, especially downwards. Extending far down from the top, or surface, to the bottom, literally or figuratively.
The lake is extremely deep.
Extending far down from the top, or surface, to the bottom, literally or figuratively.
The lake is extremely deep.
Positioned far from the surface or other reference point, especially down through something or into something.
Diving down to deep wrecks can be dangerous.

Far, especially far down through something or into something, physically or figuratively.
The ogre lived in a cave deep underground.
In a profound, not superficial, manner.
I thought long and deep.
In large volume.
breathe deep, drink deep

To overthink; to treat as being deeper (“more profound, significant”) than in reality.
― Ugh, why are these road markings so awfully arranged?― Quit deeping it bro, just drive, innit.
To think about, especially deeply (“profoundly”); to consider.

From Middle English dep, deep, depe, from Old English dēop (“deep, profound; awful, mysterious; heinous; serious, solemn, earnest; extreme, great”), from Proto-West Germanic *deup, from Proto-Germanic *deupaz (“deep”), from Proto-Indo-European *dʰewbʰ- (“deep”).