def vs due, What's the Difference?

Which to use

“def” and “due” are a confusable Portuguese pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#32,132
“def” frequency rank: #24,954
“due” frequency rank: 57086
confusion score

Side-by-Side Comparison

Feature	def	due
Definition	algo muito bom	devido

Where the eye mixes def and due

Muted = shared; highlighted = the visual trap. They share 2 letters in sequence. def (CVC) and due (CVV) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.

3 ch

def

3 ch

due

Why the eye confuses def with due

A purely visual mix-up. def (/dɛf/) and due (/dju/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 57086, derived from the frequency rank of both members and their visual similarity.

def is recorded at frequency rank #32,132, classified as anadj, pronounced /dɛf/. due is at rank #24,954, tagged as anadj, pronounced /dju/.

Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.

With a confusion score of 57086, this pair ranks #9,549 of 75,631 scored Portuguese confusable pairs - among the most confusable pairs.

Orthographic DNA of def vs due

Shared letters: de. Private to "def": f. Private to "due": u.

"def" · 3 letters · shape CVC · "due" · 3 letters · shape CVV

Frequently Asked Questions

Do "def" and "due" mean the same thing in a sentence?

No. They are said differently (/dɛf/ versus /dju/) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.

In ordinary Portuguese text, does "def" or "due" show up more?

"due" is the more common of the two: it sits at frequency rank #24,954 in our Portuguese list, against #32,132 for "def". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.

Full dictionary entry for "def" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "due" - compare definitions side by side with the headword page. Word entry
This pair ranks #9,549 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
"def" and "due" also get mixed up with nearby pairs, the highest-scored neighbour is "dat vs def". Nearby pair

Confusion rank #9,549 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.