D defs.my
Entry 1 sense Webster, 1913

deflate

/dĭf-lāt'/ · de·flate · IPA /diːˈfleɪt/
01 v. t. To reduce from an inflated condition; used literally and metaphorically; as, to deflate a tire; to deflate expectations.
  1. 1.
    To reduce from an inflated condition; used literally and metaphorically; as, to deflate a tire; to deflate expectations.