English Reference
Adjective

undecided

adj.
B2 Upper Intermediate US /ˌəndɪˈsaɪdɪd/ UK /ˌʌndɪsˈaɪdɪd/ un·de·cid·ed

adj.not having made a final choice or decision yet. You use this when you are still thinking about different options.

adj.not having reached a definitive decision or resolution. Often used predicatively after a linking verb or to describe a person who has not yet cast a vote.


SIMPLE

I am still undecided about which car to buy.

CONTEXTUAL

With the election only days away, both candidates are focusing their efforts on the large number of undecided voters.

COMPLEX

The committee remains undecided on the proposed budget cuts, as several members have expressed concerns regarding the long-term impact on departmental research and development.

Usage

Often follows linking verbs like 'be', 'remain', or 'stay'. Frequently paired with the preposition 'about' or 'on'.

The number of undecided voters in advance of the vote was much lower than at previous elections, polling showed.

The Guardian· 7 Sept 2026

From Middle English undecided, equivalent to un- + decided.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Origin Middle English undecided
Level B2 · Upper Intermediate
Frequency Frequent
Updated