What does threshold mean?
A threshold is the boundary or point at which something begins, changes, or becomes important. It may be a physical feature, such as the sill beneath a doorway, but it is most often used figuratively to describe the beginning of a process or the point at which a limit becomes significant. Someone might say that a person has crossed the threshold into adulthood, that a proposal has reached the threshold of acceptance, or that a stimulus has exceeded a pain threshold. The word conveys both transition and measurement: it identifies not only a change but the precise boundary where that change occurs. In medical, psychological, legal, and academic contexts, threshold often denotes a numerical or observable limit. Its useful distinction is that it marks entry into a new state rather than simply describing a general degree.
A boundary, limit, or point at which something begins or becomes significant; also, the strip or sill beneath a doorway.
"The treatment is usually recommended once the patient's symptoms reach a certain threshold."
The abstract senses are much more common today than the literal doorway sense.
To begin to enter, cross, or reach a particular stage or limit.
"The company is thresholding a new phase of growth after completing its restructuring."
This use is relatively uncommon and is more typical of formal or technical writing.
Plural thresholds is standard when referring to multiple limits, boundaries, or stages of transition.
"The study identified several thresholds for severe weather warnings."
From the sill of a doorway to the edge of pain, a threshold marks the exact moment one state becomes another.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does threshold come from?
The English word descends from Old English þerscōld, an early term for a doorway sill or boundary. It developed through Middle English forms such as threschold and acquired its modern figurative sense of a limiting point during the early modern period. The word is Germanic in origin and belongs to a family of related forms in languages including Dutch and German, though it is not commonly used as a cognate in modern English.
Related word forms
How threshold is actually used
In figurative use, threshold usually suggests a definite point of transition and can carry a formal or elevated tone. The verb is less common than the noun and is especially associated with beginning to enter a new phase or state.
Easily confused with threshold
A threshold is a boundary or point of entry, whereas to thresh is to beat or separate grain from stalks.