oakˈy adjective

1. Like oak, firm
2. Having many oaks

oak apple noun

A gall caused by an insect on an oak

Oak-apple Day noun

29 May, the anniversary of the Restoration in 1660, when country boys used to wear oak apples in commemoration of Charles II hiding in the branches of an oak (the Royal Oak) from Cromwell's troopers after the Battle of Worcester

oak eggˈer noun

An egger moth whose caterpillars feed on oak

oakˈenshaw noun

A little oak-wood

oak fern noun

A fern (Thelypteris dryopteris) of the polypody family (translation of Gr dryopteris, a name perh given to ferns growing on oak trees, transferred by Linnaeus to this species)

oak gall noun

A gall on an oak tree caused by an insect of the Cynipidae family

oakˈ-leaf noun

oak-leaf cluster noun (US)

A form of additional military decoration

oak leather noun

A fungus mycelium in the fissures of old oaks

oak lump noun

The lichen lungwort

oak mast noun

Acorns collectively

oakˈ-nut noun

A gall on the oak

oak tree noun

oak wilt noun

A serious fungal disease of oak trees, causing wilting and discoloration of foliage

oakˈ-wood noun

sport one's oak (university sl, chiefly Oxford and Cambridge)

To keep one's outer door shut when one does not want visitors

sudden oak death see under sudden

The Oaks

A classic English horse race (founded 1779) for three-year-old fillies, named after an estate near Epsom