1. the first letter of the Greek alphabet
2. the beginning or first in a series
3. the dominant individual in a group

1. being the first or most important
2. dominant or assertive

Examples

• Alpha is the first letter in the Greek alphabet.
• The project is still in its alpha phase.
• The alpha wolf led the pack through the forest.
• She has an alpha personality in business meetings.
• The alpha version of the software had many bugs.
• He established himself as the alpha male of the group.
• The alpha particle contains two protons and two neutrons.