Definition, Meaning & Synonyms

the-thin-end-of-the-wedge

idiomatic expression

/ðə θɪn ɛnd əv ðə wɛdʒ/

Definition

A phrase used to describe an action or development that is relatively minor but is likely to lead to more serious consequences or a larger problem.

Examples

Introducing a small tax on sugary drinks is just the thin end of the wedge; soon, we could see taxes on other food items.
If we allow this one exception, it will be the thin end of the wedge for more leniency in other cases.

Meaning

This expression suggests that a small initial step or decision can initiate a series of events or changes that lead to significant outcomes, often negative.