| Noun | 1. | silver fir - any of various true firs having leaves white or silvery white beneathfir tree, true fir, fir - any of various evergreen trees of the genus Abies; chiefly of upland areas Abies amabilis, amabilis fir, Pacific silver fir, red silver fir, white fir, Christmas tree - medium to tall fir of western North America having a conic crown and branches in tiers; leaves smell of orange when crushed Abies alba, European silver fir, Christmas tree - tall timber tree of central and southern Europe having a regular crown and grey bark Abies concolor, Abies lowiana, California white fir, Colorado fir, white fir - medium to tall fir of central to western United States having a narrow erect crown and soft wood Abies balsamea, balm of Gilead, balsam fir, Canada balsam - medium-sized fir of northeastern North America; leaves smell of balsam when crushed; much used for pulpwood and Christmas trees Abies fraseri, Fraser fir - small fast-growing but short-lived fir of southern Alleghenies similar to balsam fir but with very short leaves Abies grandis, giant fir, grand fir, lowland fir, lowland white fir - lofty fir of the Pacific coast of northwestern America having long curving branches and deep green leaves Abies lasiocarpa, Alpine fir, subalpine fir - medium-tall timber tree of the Rocky Mountains having a narrowly conic to columnar crown |