1. make all the difference - Verb
2. make all the difference - Phrase
make all the difference (third-person singular simple present makes all the difference, present participle making all the difference, simple past and past participle made all the difference)
(idiomatic) To be a crucial or deciding factor; to have a very significant effect (often a positive one).
Good habits formed at youth make all the difference. Aristotle
Novels aren't just happy escapes; they are slivers of people's souls, nailed to the pages, dripping ink from veins of wood pulp. Reading the right one at the right time can make all the difference. Brandon Sanderson
A great teacher who is full of excitement and love for her students can make all the difference in their lives. Deval Patrick
Everything, in the end, comes down to timing. One second, one minute, one hour could make all the difference. Sarah Dessen
Every day of our lives we are on the verge of making those changes that would make all the difference. Mignon McLaughlin
Kyoya: A single day can make all the difference. Bisco Hatori