Uncertain

/ʌnˈsɜːr.tən/

Meaning & Definition

adjective
Not able to be relied on; not known or definite.
The outcomes of the experiment remain uncertain due to various uncontrollable factors.
Feeling doubtful or unsure.
She felt uncertain about her decision to move to a new city.
Subject to change; not fixed.
The weather forecast is uncertain this week, with rain possible on any day.
Not clearly known or determined.
The details of the agreement are still uncertain and need to be clarified.

Etymology

Late Middle English: from un- 'not' + certain.

Common Phrases and Expressions

on uncertain ground
in a precarious or insecure situation
uncertain times
periods of anxiety or instability
in uncertain terms
not clearly or definitively stated

Related Words

certainty
the quality of being reliably true.
uncertainty
the state of being uncertain.
certain
known for sure; established beyond doubt.

Slang Meanings

iffy
The plan is a bit iffy right now.
up in the air
Our vacation plans are still up in the air.