1 : a caustic substance produced by heating limestone
2 : any of various deciduous trees of the genus Tilia with heart-shaped leaves and drooping cymose clusters of yellowish often fragrant flowers; several yield valuable timber
3 : a sticky adhesive that is smeared on small branches to capture small birds
4 : deciduous trees with smooth usually silver-grey bark of North America and Europe and Asia: lime trees; lindens; basswood
5 : deciduous trees with smooth usually silver-grey bark of North America and Europe and Asia: lime trees; lindens; basswood
6 : the green acidic fruit of any of various lime trees
