(~s, waning, ~d)
1.
If something ~s, it becomes gradually weaker or less, often so that it eventually disappears.
While his interest in these sports began to ~, a passion for rugby developed.
...her mother’s waning strength.
= fade
wax and ~: see wax
VERB: V, V-ing
2.
If something is on the ~, it is becoming weaker or less.
In 1982, with his career prospects on the ~, he sold a script for ?5,000.
= diminishing
PHRASE: v-link PHR
3.
When the moon is waning, it is showing a smaller area of brightness each day as it changes from a full moon to a new moon.
The moon was waning, and each day it rose later.
VERB: usu cont, V