1. most important or prominent; leading
2. positioned at the front

1. before anything else; first and most importantly

Examples

• She is the foremost expert on climate change.
• Safety is our foremost concern.
• The foremost runner crossed the finish line.
• He sat in the foremost row of the theater.
• First and foremost, we need to address the budget.
• The company is foremost a technology firm.
• The foremost priority is student safety.