smalls /smɔːlz/ noun[plural only]4 •(UK, informal) Underwear.He's in the garden hanging his smalls on the washing line.The smalls he was wearing were tight. •(informal) Ellipsis of small ads.Provincial English papers still carry their “smalls” — want ads — on the first page. — 1957 •Small goods. •(old-fashioned) The preliminary examination for a degree.