adj, noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   Air Post Office (both Army and Air Force)
2. 2
   Clipping of apolipoprotein. abbreviation, alt-of, clipping
3. 3
   Army Post Office
4. 4
   Air Force Post Office
5. 5
   Initialism of acute pulmonary oedema. abbreviation, alt-of, initialism

Adjective

1. 1
   In an inactive, unbound state not-comparable

   "In this scenario, unbound proteins are predominantly in the ligand-free ("apo") structure."

Synonyms

All synonyms

ab-awayde-off-out-

Antonyms

All antonyms

en-

Example

More examples

"In this scenario, unbound proteins are predominantly in the ligand-free ("apo") structure."

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.