Meaning of “even” - Learner’s Dictionary

even

adjective uk us /ˈiːvən/
FLAT

flat, level, or smooth:

Find an even surface to work on.
→ Opposite uneven
NOT CHANGING

An even temperature or rate is regular and does not change very much:

Walking at an even pace, they covered about four miles in the first hour.
NUMBER

An even number is a number that can be exactly divided by two, for example four, six, or eight.

→ Opposite odd
MONEY informal

not now owing someone money:

If you pay for my cinema ticket, we'll be even.
COMPETITION

An even race or competition is one that both players, teams, or people involved have an equal chance of winning.

get even (with sb) informal

If you get even with someone who has done something bad to you, you do something bad to them.

(Definition of “even adjective” from the Cambridge Learner’s Dictionary © Cambridge University Press)