Definition of the first thing
- He doesn't know/understand the first thing about the problems we've been having.
: preceding all others in time, order, or importance: such as
: being the lowest forward gear or speed of a motor vehicle
: before another in time, space, or importance
: in the first place
: for the first time
: one that is number one in a series — see Table of Numbers
: something that is first: such as
: the first occurrence or item of a kind
: an object or entity not precisely designated or capable of being designated
: an inanimate object distinguished from a living being
: a separate and distinct individual quality, fact, idea, or usually entity
What made you want to look up the first thing? Please tell us where you read or heard it (including the quote, if possible).