glad hand noun 2glad-hand verb 2forms 4 noun2 •A warm welcome offered to a guest by a host.And with that he gave me the "glad hand" and a pat on the shoulder. — 1917 •A coupling device used on semi-trailer trucks for attaching air brake lines from the tractor to the trailer. glad-hand verb2 •To extend a glad hand (to someone); to welcome warmly. •To be overly friendly with (a stranger) in order to gain an advantage.Not in many a moon had he glad-handed so many people. […] The President, in fact, behaved noticeably like a candidate for reelection. — 1948 formsglad-handed · glad-handing · glad-hands · glad hands