I. max 1 /mæks/ BrE AmE noun [countable] informal
[ Date: 1800-1900 ; Origin: maximum ]
1 . the abbreviation of maximum :
Five people will fit, but that’s the max.
2 . to the max to the greatest degree possible:
We had the air conditioner turned up to the max.
—max adjective , adverb :
Let’s say two hours to get there, max.
II. max 2 BrE AmE verb
max out phrasal verb American English informal
1 . max something ↔ out to use something such as money or supplies so that there is none left:
I maxed out my Visa.
2 . to do too much, eat too much etc
max out on
‘Want a beer?’ ‘Nah, I maxed out on booze this weekend.’