If you're Israeli, it means jack shit.

It's when you tell a fire to stop doing what it's doing, if it's a respectful fire, it'll listen

To civilized nations and sane politicians, it means a suspension of hostilities in a war. It's not a truce or any other sort of resolution to the war yet - merely an agreement to stop fighting for some period.

To Trump it's just another of the countless things he doesn't even realize he's never bothered to understand, and is only notable for his belief that claiming responsibility for one should get him a Peace Prize (except that the Nobel committee is nasty and mean and won't admit that he's the most beautifully awesome president ever in the history of ever even though everybody else knows it's true except for all those other mean, nasty people who won't admit it).

To Israel, it's an entirely meaningless word that sometimes threatens to interfere with their right as God's chosen people to rob, rape and murder anybody who tries to stop them from taking whatever land they want.

If you are Israel ceasefire just means "the time to reload the machine gun while the children/targets are distracted". Technically a very brief ceasefire I guess?

A "ceasefire" can mean multiple different things, depending on context.

When firefighters are doing a controlled burn, and the chief feels like things are getting a little too hot, he'll call for a ceasefire where the other firefighters will promptly extinguish the blaze.

When you're at a gun range, and you need to put up a new target, you call for a ceasefire where everyone magdumps as fast as possible, so they can put down their weapons, and you can walk out to put up the new target in safety. Some ranges have ceasefires on a scheduled basis, others will only do it when someone calls for one.

If you are pee shy, and at a urinal peeing, and someone comes up to stand next to you, and that causes you to stop peeing temporarily, you can call a ceasefire to let that man know you aren't just being weird by standing at the urinal after you're done.

In wartime, a ceasefire is when you extinguish fires at night to prevent the enemy from determining your position based on the light produced.

Directors for movies, plays, and TV shows usually have incorrect ideas about what a ceasefire is, so you'll see lots of odd occurrences called a ceasefire in movies, TV, and plays.

There's probably others, but that's the ones I'm familiar with.