1. past tense of redline: to operate an engine at maximum speed or capacity
Usage: automotive
2. past tense of redline: to mark with a red line, especially to indicate rejection or deletion
3. past tense of redline: to deny services or loans to residents of certain areas based on racial or economic factors
Usage: discriminatory practice; historical

Examples

• The race car driver redlined the engine on the final lap.
• She redlined the problematic sections of the contract before sending it back.
• The bank had redlined entire neighborhoods, preventing residents from getting mortgages.
• He redlined his motorcycle trying to catch up with the group.
• The editor redlined several paragraphs that needed revision.
• Many communities were redlined during the mid-20th century.
• The mechanic warned against keeping the engine redlined for too long.