1》 a point beyond which something does not or may not pass or extend.
↘a terminal point or boundary.
↘the furthest extent of one's endurance.
2》 a restriction on the size or amount of something: an age ~.
3》 Mathematics a value which a sequence, function, or sum can be made to approach progressively.
■ verb ( ~s , ~ing , ~ed ) set or serve as a ~ to.
be the ~ informal be intolerable.
off ~s out of bounds.
within ~s up to a point; moderately.
~ary adjective ( rare ).
ME: from L. limes , ~- 'boundary, frontier'; the verb is from L. ~are , from limes .