number one

Từ điển WordNet v3.1 - WordNet Dictionary

noun

1. a reference to yourself or myself etc.;
'take care of number one' means to put your own interests first (Freq. 1)
• Usage Domain:
colloquialism
• Hypernyms:
self
2. the first or highest in an ordering or series
- He wanted to be the first
• Syn:
first
• Hypernyms:
rank
• Hyponyms:
former
3. the first element in a countable series
- the first of the month
• Syn:
first, number 1
• Hypernyms:
ordinal number, ordinal, no.