Intermediate (B1)
IPA: //baɪˈlætərəli//
KK: /baɪˈlætərəli/
Definition
In a way that involves two sides or parties.
Example
The agreement was reached bilaterally between the two countries.
Conversation

Did you hear about the new agreement they reached?

Yeah, I think it’s great that they’re working bilaterally on this issue.

Absolutely! It really shows how much they value cooperation.

For sure, I hope it leads to more positive changes in the future.
Synonyms & Antonyms
Synonyms
mutually
reciprocally
symmetrically
Antonyms
unilaterally
asymmetrically
independently
Root Explanation
Bilaterally → It is formed from "bi-" (meaning two) and "lateralis" (from Latin, meaning side). The word "bilaterally" refers to something that occurs on or affects both sides.
Memory Tip
Think of 'bi-' meaning two and 'lateralis' referring to sides — this helps you remember that 'bilaterally' means something that involves both sides.
Visually Confused Words
laterally
unilaterally
trilaterally
equilaterally
basilateral
bacterially
ambilateral
multilaterally