Wordnet 3.0
NOUN (2)
1.
a warning to take action concerning something that was overlooked or neglected;
- Example: "the bombing was a wake-up call to strengthen domestic security"2.
a telephone call that you request be made a specific time in order to wake you up at that time (especially in hotels);
- Example: "she left a wake-up call for 7 a.m."
WordNet (r) 3.0 (2006):
wake-up call
n 1: a warning to take action concerning something that was
overlooked or neglected; "the bombing was a wake-up call to
strengthen domestic security"
2: a telephone call that you request be made a specific time in
order to wake you up at that time (especially in hotels);
"she left a wake-up call for 7 a.m."