Plain-English definition
Liquidity is the depth of the water. It is the amount of an asset you can buy or sell before your own order starts pushing the price against you. Deep water absorbs a big ship without a ripple; shallow water lurches.
Almost everything else in this glossary is a consequence of liquidity. Slippage, peg stability, and how cleanly a large holder can exit are all questions about how deep the pool is at that moment.
Why it matters
Liquidity matters because crypto markets can look precise while still being shallow, crowded, or poorly sourced. A useful read is not just the number. It is the number, the size behind it, the context around it, and the part it cannot explain.
Simple example
A simple Liquidity example is a reader comparing two venues with the same headline price but different depth. The deeper venue can absorb more capital before the trade, peg, or yield reading starts to move against the user.
How Bathymark uses this term
Bathymark uses Liquidity to translate open market data into live liquidity readings. When the term touches a live page, the reading links back to the relevant chain, protocol, stablecoin, DEX, perps, or Signal so the source remains checkable.
Common mistake
The common mistake is treating Liquidity as a complete signal by itself. Bathymark treats it as one instrument: useful when read beside liquidity, source, size, and what the number cannot prove.