1. Deeply or seriously thoughtful
   - brooding, broody, contemplative, meditative, musing, pensive, pondering, reflective

See also: ruminate, thoughtful

• umbrella tree
• umbrella-shaped
• umbrellalike
• umbrellawort
• Umbria
• Umbrian
• Umbrina
• Umbrina roncador
• Umbundu
• umiak
• umlaut
• Umma
• Umma Tameer-e-Nau
• Ummah
• ump
• umpirage
• umpire
• umpteen
• umpteenth
• umptieth
• umteen
• umteenth
• UN agency
• un-
• un-American