English Reference
Adverb

additionally

adv. sent.
B2 Upper Intermediate Oxford US /əˈdɪʃəˌnəɫi/ UK /ɐdˈɪʃənəli/ ad·di·tion·al·ly

adv.used to introduce a new piece of information that supports or adds to what you just said. It is a more formal way of saying 'also' or 'plus'.

adv.used to introduce a supplementary fact or argument that reinforces a previous statement. Functions as a cohesive device to link ideas within a text.


SIMPLE

Additionally, the hotel offers a free breakfast.

CONTEXTUAL

The new software is faster than the old version; additionally, it requires less memory to run.

COMPLEX

The report highlights the environmental benefits of the project; additionally, it provides a detailed breakdown of the projected long-term cost savings for the local community.

Usage

Typically placed at the beginning of a sentence followed by a comma, or used to connect two independent clauses after a semicolon.

Pitfall
Additionally to the cake, I bought fruit.In addition to the cake, I bought fruit.

Learners often confuse the adverb 'additionally' with the prepositional phrase 'in addition to' when followed by a noun.

Usage additionally include · additionally observe · additionally provide

Additionally, they can reduce the amount of energy needed for heating and cooling buildings by acting as insulation.

Phys.org· 14 Aug 2026

Additionally, one million young people are now being offered the MenB vaccine in a one-off, targeted programme this summer to help protect them.

BBC News· 16 Jul 2026

From additional + -ly.

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

This entry
Level B2 · Upper Intermediate
Frequency Common
Updated