Harden

(redirected from harden off)
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Harden

1. To secure a computer system to make it more likely to withstand an attack from a hacker.

2. See: Hard asset.
References in periodicals archive ?
When three leaves have emerged, plant seedlings in soil that has been warmed under a cloche and then harden off under a cloche.
Harden off hanging baskets and window boxes, ready to put into position outdoors when all danger of frost is over.
Start to harden off summer bedding, but watch out for forecasts of late frost, as they will need protection from this.
Transplant into seed trays when two true leaves have developed and grow on at 55F until mid-April, when they can be placed in a cold frame to harden off, ready to be planted out in May.
Then place in a cold frame to harden off, to plant out in May.
The danger of frost has virtually gone so harden off tender bedding plants and vegetables for planting out.
Start to harden off autumn-sown cauliflower as conditions allow to be ready for planting out in March.