IPA: /ˌpriːˈprəʊɡræm/
KK: /priˈprōgrəm/
To set up a program or instructions ahead of time so that they will run automatically later.
The technician will preprogram the device to start at 8 AM every day.
Past: preprogrammed
Past Participle: preprogrammed
Preprogram → It is formed from "pre-" (meaning before) and "program" (from Greek "programma", meaning a written public notice or a plan). The word "preprogram" means to set up a program or plan in advance.
Think of setting up a plan or program "before" it happens — "pre-" means before, and "program" refers to the plan.