threshold

Pronunciation

• (UK) IPA ^(key): /ˈθrɛʃ(h)əʊld/
• (US) IPA ^(key): /ˈθrɛʃ(h)oʊld/

• Audio (US)

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Noun

Singular threshold

Plural thresholds

1. A threshold is the bottom part of a door that a person crosses to enter.
   • Synonym: sill
2. (aviation) The threshold of a runway is the start of the landing area.
3. A threshold is the point where something must be exceeded for a certain reaction to happen.