the.com/transaction

Two parties agree one thing is worth another, then spend years disagreeing anyway.

means An exchange of money, goods, or services between parties — the completed act of doing business.

from From Latin transactio, 'a completing, an agreement,' built from trans- ('across') plus agere ('to drive, do, act'). The same agere gives English 'agent' and 'act' — so a transaction is literally something 'driven across' or 'done through' to completion, a deal pushed over the finish line from one party to another.

legal core
requires offer, acceptance, and something of value exchanged
database meaning
all steps succeed together or none happen at all
etymology
from Latin transigere, to drive through or settle
smallest unit
commerce has no transaction, it has only relationships
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