Learner's definition of MOMENT
1 [count] : a very short period of time
The sunshine that was here a moment [=minute, second] ago is gone.
The sun was shining. Moments later, it began to rain.
It was a moment before she realized what had happened.
She stopped for a moment and peeked into the window.
It should only take a moment to fix the problem.
Do you have a (spare) moment? [=do you have some free time so we can talk to each other briefly?]
I'm very busy and I don't have a moment to spare.
The doctor arrived not a moment too soon. [=the doctor arrived just in time to help]
I'll explain that in a moment. [=shortly, soon]
The crowd observed a moment of silence [=a short period of silent thought or prayer] for those who died in the tragedy.
2 [count] : a particular time: a precise point in time
One moment it was sunny; the next it was pouring rain.
We enjoyed every moment of the play. [=we enjoyed all of the play]
The moment for us to act has arrived.
The moment is ripe for action. [=this is the right time for action]
War seemed unavoidable at that moment in history.
She knew exactly the right moment to ask for a raise.
We had an exciting vacation. There was never a dull moment.
3 a [noncount] : the present time
At the moment [=right now, at the current time] she is working on a novel.
We aren't prepared at this moment [=at this time, now] to say what our plans are.
As of this moment [=as of now, right now], there's nothing you can do.
◊ Something that is true for the moment is true now but might not be true for long.
For the moment, it is the world's largest city. [=it is the world's largest city now, but that may not be true much longer]
He's staying out of trouble for the moment.
For the moment, at least, I had the room to myself.
b [count] : a time of importance or success
Someone or something that is of the moment is very popular at a particular time.
She took the time to relish her moment of triumph.
He's not the best player on the team, but he has his moments. [=he has times when he is extremely good, successful, etc.]
It was a defining moment for him.
It was a crowning moment in his presidency.
◊ If something could happen (at) any moment (now), it could happen very soon.
He could lose his temper at any moment.
The war could begin at any moment.
She should be arriving at any moment now.
from moment to momentorfrom one moment to the nextormoment by moment
: very quickly as time passes
hold/hang on a momentinformalorwait/just a moment
— used to tell someone to wait or to stop for a brief time
moment of truth
: the time when you have to do or decide something
The moment of truth came early, when we had to decide whether to stay or go.
It was her moment of truth, when she needed to show that she had the talent to succeed.
on the spur of the moment
the last moment
: the latest possible time: the last minute
Our flight was canceled at the last moment.
She finished her paper at the last moment.
Many people wait until the last (possible) moment before shopping for Christmas presents.
: as soon as
The moment the cameras are turned off, he is able to relax.
Everything stops the moment she walks in the room.
: very quickly: within a very short amount of time