2. Proper noun. one in a series of alphanumerics used in many national road systems. ¹
¹ Source: wiktionary.com
Lexicographical Neighbors of A4
| A/B A/C A/G A/G ratio A/R A/S A0 A1 A10 A2 | A20 gate A2S A2Ss A3 A4 (current term) A440 A5 A6 A7 A8 | A9 AA AAA AAAA AAAAI AAAAs AAAS AAC AACAP |
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