Definition of "slightest"

The slightest effort made the patient cough. He would stand leaning on a stick and holding a hand to his side, and when the paroxysm had passed it left him shaking.

1918, W[illiam] B[abington] Maxwell, chapter XXIII, in The Mirror and the Lamp, Indianapolis, Ind.: The Bobbs-Merrill Company

Over the past few months, RAIL has frequently condemned the Department for Transport for its growing contempt for rail customers - by obsessing on cost, caring nothing for service, and not having the slightest interest in growth.

2023 August 9, Nigel Harris, “Comment: Disinterested and dishonest”, in RAIL, number 989, page 3