Definition from Wiktionary, the free dictionary
one; 1; single; a; (before verbs) as soon as, once; (before a noun) entire (family, etc.)
|mountain; hill||(negative prefix); not; no||
to hold; to contain; to allow; appearance; look; countenance
|simp. and trad.
Literally: One mountain cannot abide two tigers.
- There can only be one alpha male.
- This town isn't big enough for the two of us.