occlusion
UK[əˈkluːʒn]US[əˈkluːʒn]
n
The process of something becoming blocked or closed.
n
(Meteorology) The process by which a cold front overtakes a warm front, lifting the warm air mass off the ground.
n
(Dentistry) The alignment and contact between the upper and lower teeth when the jaw is closed.
n
(Phonetics) A complete closure in the vocal tract during the articulation of a consonant sound.
Morpheme Breakdown
oc
clus
ion
oc
against, to
clus
to close, to shut
ion
noun suffix
Etymology
The word 'occlusion' traces its lineage to the Latin verb 'occludere', meaning 'to shut up' or 'to close off'. This verb itself is a compound of the prefix 'ob-' (here assimilated to 'oc-'), implying 'against' or 'completely', and the root 'claudere', meaning 'to close'. The literal sense of a complete shutting against passage is preserved in its core meaning of blockage. Over time, this concept of closure was metaphorically and technically extended into specialized fields such as dentistry, meteorology, and phonetics, each applying the idea of a meeting, blocking, or sealing off within their specific contexts.
Analysis
Structure: oc (against, to) + clus (to close, to shut) + ion (noun suffix)
- oc: A form of the Latin prefix 'ob-', meaning 'against', 'toward', or 'in the way of'. It assimilates to 'oc-' before 'c'.
- clus: From the Latin root 'claudere' (to close, to shut), appearing here in its participial stem form '-clus-'.
- ion: A Latin-derived suffix forming nouns indicating an action, process, or its result.
Examples
The patient suffered a heart attack due to the occlusion of a coronary artery.
The weather map showed a developing occlusion over the Atlantic, promising heavy rain.
The dentist adjusted the crown to improve the patient's occlusion and prevent jaw pain.