| TRO | the cardinal number that is the sum of one and one and one |
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| TRO | a native of ancient Troy |
| TRO | of or relating to the ancient city of Troy or its inhabitants |
| TRO | a large hollow wooden figure of a horse (filled with Greek soldiers) left by the Greeks outside Troy during the Trojan War |
| TRO | a subversive group that supports the enemy and engages in espionage or sabotage |
| TRO | (Greek mythology) a great war fought between Greece and Troy |
| TRO | (Scandinavian folklore) a supernatural creature (either a dwarf or a giant) that is supposed to live in caves or in the mountains |
| TRO | speak or recite rapidly or in a rolling voice |
| TRO | praise or celebrate in song |
| TRO | sing loudly and without inhibition |
| TRO | angle with a hook and line drawn through the water |
| TRO | sing the parts of (a round) in succession |