| THUNDERCLOUDS | • thunderclouds n. Plural of thundercloud. • thunder␣clouds n. Plural of thunder cloud. • THUNDERCLOUD n. a cloud charged with electricity and producing lightning and thunder. |
| UNDERCARRIAGE | • undercarriage n. The supporting structural framework of a vehicle. • undercarriage n. The landing gear of an aircraft. • undercarriage n. (Euphemistic) The genitalia. |
| UNDERCHARGING | • undercharging v. Present participle of undercharge. • UNDERCHARGE v. to charge too little. |
| UNDERCLASSMAN | • underclassman n. (US) The opposite of an upperclassman; a freshman or sophomore. • UNDERCLASSMAN n. a member of the freshman or sophomore class in a school or college. |
| UNDERCLASSMEN | • underclassmen n. Plural of underclassman. • UNDERCLASSMAN n. a member of the freshman or sophomore class in a school or college. |
| UNDERCLOTHING | • underclothing n. Clothing worn next to the skin; underwear. • UNDERCLOTHING n. clothes worn under others, esp. those next to the skin. |
| UNDERCLUBBING | • underclubbing v. Present participle of underclub. • UNDERCLUB v. in golf, to hit with a club that has too great loft to achieve the required distance. |
| UNDERCOATINGS | • undercoatings n. Plural of undercoating. • UNDERCOATING n. an undercoat of paint. |
| UNDERCOUNTING | • undercounting v. Present participle of undercount. • UNDERCOUNT v. to miscount by counting too few. |
| UNDERCRACKERS | • undercrackers n. (UK, informal) Men’s underpants. • UNDERCRACKERS n. (slang) underwear. |
| UNDERCRESTING | • UNDERCREST v. (Shakespeare) to bear like a crest. |
| UNDERCURRENTS | • undercurrents n. Plural of undercurrent. • undercurrents v. Third-person singular simple present indicative form of undercurrent. • UNDERCURRENT n. a current below the upper currents or surface. |