( first names)
Your first name is the first of the names that were given to you when you were born. You can also refer to all of your names except your surname as your first names .
Her first name was Mary. I don’t know what her surname was.
N-COUNT : usu poss N
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If two people are on first-name terms , they know each other well enough to call each other by their first names, rather than having to use a more formal title.
The two were said to have been on first-name terms...
PHRASE : usu v-link PHR , oft PHR with n