Update src/intl/en/glossary.json

Author: pettinarip

src/intl/en/glossary.json

@@ -238,7 +238,7 @@
   "ommer-term": "Ommer (uncle) block",
   "ommer-definition": "When a proof-of-work <a href=\"/glossary/#miner\">miner</a> finds a valid <a href=\"/glossary/#block\">block</a>, another miner may have published a competing block which is added to the tip of the blockchain first. This valid, but stale, block can be included by newer blocks as <em>ommers</em> and receive a partial block reward. The term \"ommer\" is the preferred gender-neutral term for the sibling of a parent block, but this is also sometimes referred to as an \"uncle\". This was relevant for Ethereum when it was a <a href=\"/glossary/#pow\">proof-of-work</a> network, but ommers are not a feature of <a href=\"/glossary/#pos\">proof-of-stake</a> Ethereum because precisely one block proposer is selected in each slot.",
   "on-chain-term": "On-Chain",
-  "on-chain-definition": "On-chain is an umbrella term that includes any transaction or data that is available on the blockchain and visible to all nodes on the blockchain network such as mempool data, historical transactions, and account information.",
+  "on-chain-definition": "Refers to actions or transactions that happen on the blockchain and are publicly available.<br /><br />Think of it as writing something in a big, shared notebook that everyone can see and check, making sure that whatever is written (like sending digital money or making a contract) is permanent and can't be changed or erased.",
   "optimistic-rollup-term": "Optimistic rollup",
   "optimistic-rollup-definition": "A <a href=\"/glossary/#rollups\">rollup</a> of transactions that use <a href=\"/glossary/#fraud-proof\">fraud proofs</a> to offer increased <a href=\"/glossary/#layer-2\">layer 2</a> transaction throughput while using the security provided by <a href=\"/glossary/#mainnet\">Mainnet</a> (layer 1). Unlike <a href=\"/glossary/#plasma\">Plasma</a>, a similar layer 2 solution, Optimistic rollups can handle more complex transaction types – anything possible in the <a href=\"/glossary/#evm\">EVM</a>. They do have latency issues compared to <a href=\"/glossary/#zk-rollups\">Zero-knowledge rollups</a> because a transaction can be challenged via the fraud proof. <a href=\"/developers/docs/scaling/optimistic-rollups/\">More on Optimistic rollups</a>.",
   "oracle-term": "Oracle",